题目内容
（请给出正确答案）
What do the bees round dance and tail-wagging dance indicate？
A．The smell of the food.
B．The quality of the food.
C．The distance of the food.
D．The amount of the food.
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更多“What do the bees round dance a…”相关的问题
What will the man probably do over the weekend？
A．To visit his parents.
B．To write a paper.
C．To observe how bees build nests.
D．To plan a family reunion.
What must someone do to become a licensed beekeeper？
A．Take three weeks of classes
B．Pass a specialized test
C．Subscribe to a website
D．Purchase a colony of bees
Bees and Color
On our table in the garden we put a blue card, and all around this blue card we put a number of different gray cards. These gray cards are of all possible shades of gray land include white and black. on each card a watch-glass is placed .The watch-glass on the blue card has some syrup (果汁) in it; all the others are empty. After a short time bees find the syrup, and they come for it again and again. Then, after some hours, we take away the watch-glass of syrup which was on the bluecard and put an empty one in its place.
Now what do the bees do？ They still go straight to the blue card, although there is no syrup there. They do not go to any of the gray cards, in spite of the fact that one of the gray cards is of exactly the same brightness as the blue card. Thus the bees do not mistake any shade of gray. for blue. In his way we have proved that they do really see blue as a color.
We can find out in just the same way what other colors bees can see. It turns out that bees can see various colors, but these insects differ from us as regards their color-sense in two very interesting ways. Suppose we train bees to come to a red card, and, having done so, we put the red card on the table in the garden among the set of different gray cards. This time we find that the bees mistake red for dark gray or black. They cannot distinguish between them. This means that red is not a color at all for bees; for them it is just dark gray or black.
That is one strange fact; here is another. A rainbow is red on one edge, violet on the other. Outside the violet of the rainbow there is another color which we cannot see at all. This color beyond the violet, invisible to us, is called the ultra-violet. Although it is invisible, we know that the ultra -violet is there because it affects a photographic plate. Now, although we are unable to see ultra -violet light, bees can do so; for them ultra -violet is a colon Thus bees see a color which we cannot even imagine. This has been found out by training bees to come for syrup to various parts of a spectrum, or artificial rainbow, thrown by a prism on a table in a dark room. In such an experiment the insects can be taught to fly to the ultra-violet, which for us is just darkness.
Experiment with bees described in the first and second paragraphs tell us that bees regard blue as a colon
A．True
B．False
C．Not mentioned
Bees do two kinds of【B4】to tell other bees of their【B5】of food. First, there is a round dance.【B6】this dance, the bee moves in a【B7】inside the hive. The round dance is used【B8】the food is close by. The food must not be more than ten meters【B9】If a bee comes back and dance a round dance, other bees know they must go out and look nearby for food. The bees also【B10】the bee that has found the food. The smell tells them what kind of flower to【B11】After watching the round dance and smelling the bee【B12】has found the food, the other bees can find the other source.
A second kind of dance【B13】by the bee is a tail-wagging dance. In this dance, the bee wiggles the【B14】of its body as it moves in a【B15】line. The tail-wagging dance is used when the food is far away. The food must be【B16】ten meters away. The bees know from the speed of the tail-wagging dance just how far away the food source is. The line the bee dances on shows the direction that the bees【B17】fly into find the food. In the tail-wagging dance, the bees also smell the bee【B18】has found the food. The smell tells them what kind of flowers to look for. After watching the tail-wagging dance and smelling the bee that has found the food, the other bees know【B19】things. They know how far【B20】fly, what direction to fly in, and what kind of flowers to look for.
【B1】
A．for food
B．for eating
C．to eat
D．for eating food
Where Have All the Bees Gone？
Scientists who study insects have a real mystery on their hands．A11 across the country，honeybees are leaving their hives and never returning. Researcher call this phenomenon colony—collapse1 disorder．According to surveys of beekeepers across the country，25 to 4o percent of the honeybees in the United States have vanished from their hives since last fall .So far，no one can explain why．
Colony collapse is a serious concern because bees play an important 11ole in the production of about one—third of the foods we eat．As they feed，honeybees spread pollen from flower to flower．Without this process，a plant can’t produce seeds or fruits．
NOW，a group of scientists and beekeepers have teamed up to try to figure out what’s causing the alarming collapse of so many colonies． By sharing their expertise in honeybee behavior，health， and nutrition，team members hope to and out what’s contributing to the decline and to prevent bee disappearances in the future．
It could be that disease is causing the disappearance of the bees．To explore that possibility，Jay Evans，a researcher at the United States Department of Agriculture（USDA）Bee Research Laboratory2，examines bees taken from colonies that are collapsing． “We know what s healthy bee should look like on the inside，and we can look for physical signs of disease，”he says．And bees from collapsing
colonies don’t look very healthy． “Their stomachs arc：worn down，compared to the stomachs of healthy bees，”Evan8 says．It may be that a parasite is damaging the bees’ digestive organs．Their immune systems may not be working as they should．Moreover，they have high levels of bacteria inside their bodies．
Another cause of colony—collapse disorder may be certain chemicals that farmers apply to kill unwanted insects on crops，says Jerry Hayes，chief bee inspector for the Florida Department of Agricuhure3．Some studies，he says，suggest that a certain type of insecticide affects the honeybee’s
nervous system（which includes the brain）and memory．“It seems like honeybees are going out and getting confused about where to go and what to do，”he says.
If it turns out that a disease is contributing to colony collapse，bees’ genes could explain why some colonies have collapsed and others have not．In any group of bees there are many different kinds of genes．The more different genes a group has，the higher the group’s genetic diversity.So far scientists haven，t determined the role of genetic diversity in colony collapse，but it’s a promising theory，says Evans．
第 36 题 What is the mystery that researchers find hard to explain？
A．Honeybees are flying all across the country.
B．25-40 percent of the honeybees in the US have died.
C．Honeybees are leaving their hives and do not return.
D．Honeybee hives are in disorder．
Where Have All the Bees Gone？
Scientists who study insects have a real mystery on their hands. All across the country, honeybees are leaving their hives and never returning. Researchers call this phenomenon colony-collapse (瓦解) disorder. According to surveys of beekeepers (养蜂人) across the country, 25 to 40 percent of the honeybees in the United States have vanished from their hives (麻疹) since last fall. So far, no one can explain why.
Colony collapse is a serious concern because bees play an important role in the production of about one-third of the foods we eat. As they feed, honeybees spread pollen from flower to flower. Without this process, a plant can't produce seeds or fruits. Now, a group of scientists and beekeepers have teamed up to try to figure out what's causing the alarming collapse of so many colonies. By sharing their expertise (专家的意见) in honeybee behavior, health, and nutrition, team members hope to find out what's contributing to the decline and to prevent bee disappearances in the future.
It could be that disease is causing the disappearance of the bees. To explore that possibility, Jay Evans, a researcher at the United States Department of Agriculture (USDA) Bee Research Laboratory, examines bees taken from colonies that are collapsing. "We know what s healthy bee should look like on the inside, and we can look for physical signs of disease," he says. And bees from collapsing colonies don't look very healthy. "Their stomachs are worn down, compared to the stomachs of healthy bees," Evans says. It may be that a parasite is damaging the bees' digestive organs. Their immune systems may not be working as they should. Moreover, they have high levels of bacteria inside their bodies.
Another cause of colony-collapse disorder may be certain chemicals that farmers apply to kill unwanted insects on crops, says Jerry Hayes, chief bee inspector for the Florida Department of Agriculture. Some studies, he says, suggest that a certain type of insecticide affects the honeybee's nervous system (which includes the brain) and memory. "It seems like honeybees are going out and getting confused about where to go and what to do," he says.
If it turns out that a disease is contributing to colony collapse, bees' genes could explain why some colonies have collapsed and others have not. In any group of bees there are many different kinds of genes. The more different genes a group has, the higher the group's genetic diversity. So far scientists haven't determined the role of genetic diversity (差异) in colony collapse, but it's a promising theory, says Evans.
What is the mystery that researchers find hard to explain？
A．Honeybees are flying all across the country.
B．25--40 percent of the honeybees in the US have died.
C．Honeybees are leaving their hives and do not return.
D．Honeybee hives are in disorder.
Where Have All the Bees Goner
Scientists who study insects have a real mystery on their hands. All across the country, honeybees are leaving their hives (蜂巢) and never returning. Researchers call this phenomenon colony-collapse (群体瘫痪) disorder. It is reported that 25 to 40 percent of the honeybees in the US have vanished from their hives since last fall. So far, no one can explain why.
Colony collapse is a serious concern' because bees play an important role in' the production of about one-third of the foods we eat. As they feed, honeybees spread pollen (花粉) from flower to flower. Without this process, a plant can't produce seeds or fruits.
Now, a group of scientists and beekeepers have teamed up to try to figure out what's causing the alarming collapse of so many colonies. They hope to find out what's contributing to the decline and to prevent bee disappearance in the future.
It could be that disease is causing the disappearance of the bees. To explore that possibility, Jay Evans, a researcher at the United States Department of Agriculture (USDA) Bee Research Laboratory, examines bees taken from colonies that are collapsing. "We know what a healthy bee should look like on the inside, and we can look for physical signs of disease," he says. And bees from collapsing colonies don't look very healthy. "Their stomachs are worn down, compared to the stomachs of healthy bees," Evans says. It may be that a parasite (寄生虫) is damaging the bees' digestive organs. Their immune (免疫的) systems may not be working as they should. Moreover, they have high levels of bacteria inside their bodies.
Another cause of colony-collapse disorder may be certain chemicals that farmers apply to kill unwanted insects on crops, says Jerry Hayes, chief bee inspector for the Florida Department of Agriculture. Some studies, he says, suggest that a certain type of insecticide (杀虫剂) affects the honeybee's nervous system and memory. "It seems like honeybees are going out and getting confused about where to go and what to do," he says.
If it turns out that a disease is contributing to colony collapse, bees' genes could explain why some colonies have collapsed and others have not. In any group of bees there are many different kinds of genes. The more different genes a group has, the higher the group's genetic diversity. So far scientists haven't determined the role of genetic diversity in colony collapse, but it's a promising theory, says Evans.
What is the mystery that researchers find hard to explain？
A．Honeybees are flying all across the country.
B．Half of the honeybees in the US have died.
C．Honeybees are leaving their hives and do not return.
D．Honeybee hives are in disorder.
Where Have All the Bees Gone？
Scientists who study insects have a teal mystery on their hands． All across the country，honeybees are 1eaving their hives and never returning． Researchers call this phenomenon colony—collapse disorder． According to surveys of heekeepers across the country，25 to 40 percent 0f the honeybees in the United Stales have vanished from their hives since last fall． so far，no one call explain why．
Colony collapse is a serious concern because bees play an important role in the production of about one-third of the foods we eat． As they feed， honeybees spread p011en from flower to flower．Without this process，a plant can’t produce seeds or fruits．
Now，a group of scientists and beekeepers have teamed up to try to figure out what’s causing the alarming collapse of so many colonies． By sharing their expertise in honeybee behavior， health， and nutrition．team members hope to find out what’s contributing to the decline and to prevent bee disappearances in the future．
It could be that disease is causing the disappearance of the bees． To explore that possibility，Jay Evans．a researcher at the Unite States Department of Agriculture（USDA）Bee Research Laboratory2，examines bees taken from colonies that are collapsing．“We know what s healthy bee should look like on the inside，and we can look for physical signs of disease，”he says．And bees from collapsing’
colonies don’t look very healthy．“Their stomachs are worn down．，compared．to the stomachs 0f healthy bees，” Evans says．It may be that a parasite is damaging the bees’ digestive organs．Their immune systems may not be working：as they should．Moreover，they have high levels of bacteria inside their bodies．
Another cause of colony—collapse disorder may be certain chemicals that farmers apply to kill unwanted．insects on crops，says Jerry Hayes，chief bee inspector for the Florida，Department of Agriculture ．Some studies，he says，suggest that a certain type of insecticide affects the honeybee’ s nervous system（which includes the brain）and memory．“It seems like honeybees are going out and getting confused about where to go and what to do，”he says．
If it turns out that a disease is contributing to colony collapse，bees’ genes could explain why some colonies have collapsed and others have not．In any group of bees there are many different kinds of genes．The more different genes a group has．the higher the group’s genetic diversity．So far scientists haven’t determined the role of genetic diversity in colony collapse，but it’s a promising theory，says Evans．
第 31 题 What is the mystery that researchers find hard to explain？
A．Honeybees are bying all across the country．
B．25—40 percent of the honeybees in the US have died．
C．Honeybees are leaving their hives and do not return．
D．Honeybee hives are in disorder．
Where Have All the Bees Gone？
？？ Scientists who study insectshave a real mystery on their hands. All across the country, honeybees areleaving their hives and never returning. Researchers call this phenomenoncolony-collapse disorder. According to surveys of bee keepers across thecountry,25 t0 40 percent of the honeybees in the Unit- ed States have vanishedfrom their h？？ives since last fall. So far,no one can explain why.
？？ Colony collapse is a seriousconcern because bees play an important role in the productton of aboutone-third of the foods we eat. As they feed, honeybees spread pollen fromflower to flower. Without this process,a plant can't produce seeds or fruits.
？？ Now,a group of scientists andbeekeepers have teamed up to try to figure out what's causing the alarmingcollapse of so many colonies. By sharing their expertise in honeybee behavior,health, and nu- trition, team members hope to find out what's contributing tothe decline and to prevent bee？？ disappear- ance in the future.
？？ It could be that disease iscausing the disappearance of the bees. To explore that possibility,Jay Evans,aresearcher at the United States Department of Agriculture (USDA) Bee ResearchLaboratory,examines bees taken from colonies that are collapsing. "We knowwhat a healthy bee should look like on th？？e inside,and we can look for physicalsigns of disease," he says. And bees from collapsing colonies don't lookvery healthy. "Their stom？？achs are worn down, compared to t？？he stomachs ofhealthy bees, " Evans says. It may be that a par- asite is damaging thebees digestive organs. Their immune systems may not be working as they should.Moreo- ver,they have high levels of bacteria inside their bodies.？？
？？ Another cause ofcolony-collapse disorder may be certain chemicals that farmers apply to killun- wanted insects on crops,says Jerry Hayes, chief bee inspector for theFlorida Department of Agricul- ture. Some studies, he says, suggest that acertain type of insecticide affects the honeybee's nervous system (whichincludes the brain) and memory. "It seems like honeybees are going out andgetting confused about where to go and what to do," he says.
？？ If it turns out that adisease is contributing to colony collapse, bees genes could explain why somecolonies have collapsed and others have not. In any group of bees there aremany different kinds of ge？？nes. The more dif- ferent genes a group has, thehigher the group's genetic diversity. So far scientists haven't determined therole of genetic diversity in colony collapse, but it's a promising theory, saysEvans.
What is the mystery that researchers find hard to explain？？？
A.Honeybees are flying all across the country
B.25-40 percent of the honeybees in the US have died
C.Honeybees are leaving their hives and do not return
D.Honeybee hives are in disorder
According to the woman, what is different every year？
A．Tile length of the course.
B．The route the cyclists take.
C．The number of the participants.
D．The month in which the tour is held.
