题目内容
（请给出正确答案）
A.Material master
B.Item category
C.Partner role
D.Document type
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更多“To which object can you direct…”相关的问题
A.Moon
B.Fire
C.Forrest
D.Sun
Which of the following is NOT TRUE about exemplification？
A.Narrowing down the key word can help exemplification.
B.An example is a particular situation, object or person which shows that what is being claimed is true.
C.An example should include the deeds of famous people.
D.Exemplification is very effective in argumentation.
Which of the italicized parts functions as an object？
A．It"s too late to send him our season"s greetings.
B．I want all of you to listen carefully.
C．Jackson"s wish of becoming a doctor has come true.
D．She can"t stand being kept waiting.
Which of the following italicized parts is used as an object？
A．He wants to tell us when he will leave.
B．It has been decided when the meeting will be held.
C．What I want to know is when you can finish the experiment.
D．I have no idea when she will be back.
Which of the following italicized parts is NOT an object clause？
A．I found it necessary that we practise English every day.
B．She stood up and smiled as the headmaster came in.
C．Let"s see how we can raise our efficiency.
D．I"m not sure when she will leave for San Francisco.
A．in which case it rises
B．in that case it rises
C．in which case does it rise
D．such being the case it rises
To get a full appreciation of what this means we must turn first to some recent human inventions. Everyoneknows that if he shouts near a wall or a mountainside, an echo will come back. The further off this solid obstacle, the longer time it will take for the return of the echo. A sound made by tapping on the main body of a ship will be reflected from the sea bottom, and by measuring the time interval between the taps andthe receipt of the echoes the depth of the sea at that point can be calculated.So was born the echo-sounding equipment, now in general use in ships. Every solid object will reflect a sound, varying according to the size and nature of the object. A shoal of fish will do this. So it is a comparatively simple step fromlocating the sea bottom to locating a shoal of fish. With experience, and with improved equipment, it is now possible not only to locate fish but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.
A few years ago it was found that certain bats emit squeaks (吱吱声) and by receiving ’he echoes they could locate and steer clear of obstacles--or locate flying insects on which they feed.This echolocation in bats is often compared with radar, the principle of which is similar.@@@@@@@ Choose correct answers to the question:
The main purpose of this passage is to ______.
A.describe that animals can make different sounds
B.prove that animals’ voices can play practical roles
C.inspire the readers to make more inventions
D.startle the readers with some shocking facts
The discovery of echolocation may help with all of the following EXCEPTA.measuring the depth of the sea
B.distinguishing different kinds of fish
C.improving the functions of radar
D.varying the size and nature of an object
By saying "A shoal of fish will do this"(Lines 6-7, Para 2), the author means ________.A.only one special kind of fish can reflect sounds
B.only one special kind of fish can be used to help locate a ship
C.a large group of fish can reflect sounds
D.a large group of fish can be used to help locate a ship
As it is discussed in the passage, the squeaks of bats can be functionally compared with ________.A.human languages
B.a mountainside
C.a shoal of fish
D.taps on a ship
Which of the following statements can be inferred from the passage？A.Animals are more intelligent than humans.
B.Humans are more intelligent than animals.
C.Animals are often compared with human inventions.
D.Humans are often inspired by animals.
请帮忙给出每个问题的正确答案和分析，谢谢！
Invisibility Ring
Scientists can't yet make an invisibility cloak like the one that Harry Potter uses. But, for the first time, they've constructed a simple cloaking device that makes itself and something placed inside it invisible to microwaves.
When a person "sees" an object, his or her eye senses many different waves of visible light as they bounce off the object. The eye and brain then work together to organize these sensations and reconstruct the object's original shape. So, to make an object invisible, scientists have to keep waves from bouncing off it. And they have to make sure the object casts no shadow. Otherwise, the absence of reflected light on one side would give the object away.
Invisibility isn't possible yet with waves of light that the human eye can see. But it is now possible with microwaves. Like visible light, microwaves are a form. of radiant energy. They are part of the electromagnetic spectrum, which also includes radio waves, infrared light, ultraviolet rays, X rays, and gamma rays. The wavelengths of microwaves are shorter than those of radio waves but longer than those of visible light.
The scientists' new "invisibility device" is the size of a drink coaster and shaped like a ring. The ring is made of a special material with unusual ability. When microwaves strike the ring, very few bounce off it. Instead, they pass through the ring, which bends the waves all the way around until they reach the opposite side. The waves then return to their original paths.
To a detector set up to receive microwaves on the other side of the ring, it looks as if the waves never changed their paths -- as if there were no object in the way ! So, the ring is effectively invisible.
When the researchers put a small copper loop inside the ring, it, too, is nearly invisible. However, the cloaking device and anything inside it do cast a pale shadow. And the device works only for microwaves, not for visible light or any kind of electromagnetic radiation. So, Harry Potter's invisibility cloak doesn't have any real competition yet.
Harry Potter is mentioned in the passage, because scientists
A．can now make an invisible cloak of the same kind as he uses.
B．try to make an invisible cloak of the same kind as he uses.
C．try to invent a device similar in idea to the invisible cloak he uses.
D．know that it is possible to make an invisible cloak of the same kind.
根据以下材料，回答题
Invisibility Ring
Scientists can"t yet make an invisibility cloak like the one that Harry Potter uses. But， for the first time， they"ve constructed a simple cloaking device that makes itself and something placed inside it invisible to microwaves.
When a person "sees" an object， his or her eye senses many different waves of visible light as they bounce off the object. The eye and brain then work together to organize the sensations and reconstruct the object"s original shape. So， to make an object invisible， scientists have to keep waves from bouncing off it. And they have to make sure the object casts no shadow. Otherwise， the absence of reflected light on one side would give the object away.
Invisibility isn"t possible yet with waves of light that the human eye can see. But it is now possible with microwaves. Like visible light， microwaves are a form. of radiant energy. They are part of the electromagnetic spectrum， which also includes radio waves， infrared light， ultravioletmys， X rays， and gamma rays. The wave lengths of microwaves are shorter than those of radio waves but longer than those of visible light.
The scientists" new "invisibility device" is the size of a drink coaster and shaped likearing. The ring is made of a special material with unusual ability. When microwaves strike thering， very few bounce off it. Instead， they pass through the ring， which bends the waves all the way around until they reach the opposite side. The waves then return to their original paths.
To a detector set up to receive microwaves on the other side of the ring， it looks as if the waves never changed their paths as if there were no object in the way! So， the ring is effectively invisible.
When the researchers put a small copper loop inside the ring， it， too， is nearly invisible.
However， the cloaking device and anything inside it do cast a pale shadow. And the device works only for microwaves， not for visible light or any kind of electromagnetic radiation. So， Harry Potter"s invisibility cloak doesn"t have any real competition yet.
Harry Potter is mentioned in the passage， because scientists __________. 查看材料
A.can now make an invisible cloak of the same kind as he uses
B.try to make an invisible cloak of the same kind as he uses
C.try to invent a device similar in idea to the invisible cloak he uses
D.know that it is possible to make an invisible cloak of the same kind
Muscles are stringy bundles of fibers varying from one five-thousandth of an inch to about three inches. They have three unique characteristics: they can become shorter and thicker and can stretch to their original position. Under a high-powered microscope, muscle tissue is seen as long, slender cells with a grainy texture like wood.
More than half of a person's body is composed of muscle fibers, most of which involuntary --in other words, work without conscious direction. The voluntary muscles, those that we move consciously to perform. particular action, number more than five hundred. Women have only 60 to 70 percent as muscle as men for their body mass. That is why an average woman can't lift as much, throw as far, or hit as hard as an average man.
Intelligent use of the muscles means that ______.
A．one always knows what his muscles are doing
B．one performs simple actions without working
C．one's muscles are used only to the extent necessary for each action they perform
D．one improves muscular action consciously
【M1】
