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[主观题]
When a victim' s clothes or hair are on fire, you should not try to beat out flames with y
our hands.
A．Y
B．N
C．NG
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A．Y
B．N
C．NG
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更多“When a victim' s clothes or ha…”相关的问题
When a victim's clothes or hair are on fire, you should not ______.
A．pour water on him
B．roll him on the ground
C．cover him with a coat
D．beat the flame out with your hands
Scientists have found that there are three distinct stages in a mosquito's assault. Stage one is at fifty feet away, when the insect first smells a man or animal to bite. Stage two is thought to come into operation about twenty-five feet from the target, when the insect becomes guided by the carbon dioxide breathed out by the intended victim. Stage three is when the mosquito is only a matter of inches from its prey: the warmth and moisture given off by the victim is the final clue. The researchers then examined how repellents (驱虫剂) interfere with its three-stage attack. They found repellents act more subtly than by just giving off a nasty smell. A Canadian researcher says that repellents appear to confuse mosquitoes first when it is following the carbon dioxide and second during the find approach, where the warmth and moisture aren't the insect's guide.
Air pervaded by one of the many chemical repellents stops the mosquito reacting to the victim's carbon dioxide, anti the repellent seems to affect the tiny hairs with which the insect senses moisture in the air. The sensors are blocked so that the insect does not know when it is flying through a moist current, or the sensors are made to send the wrong signals.
One positive suggestion from the researchers followed the discovery that mosquitoes on the hunt tend to fly very close to the ground. A dense screen of trees around a village may keep mosquitoes at bay.
The experts also agree that mosquitoes seem to prefer some people to others, but they don't know why.
The phrase "homes in on its target" (Sentence 1, Para. 1) in the context means ______.
A．find its way to the intended victim
B．move towards the prey
C．set off for the target
D．aim at the victim
听力原文： Thousands of persons die each year after eating or drinking poisonous substances. Experts say most accidental poisonings happen at or near the home. And most are caused by substances we commonly use at home: medical supplies, insect poisons or cleaning fluids. There are several common signs of poisoning. A sudden feeling of pain or sickness. Bums in the area of the mouth. Or an unusual smell coming from a person's mouth.
Health experts generally advise poison victims to drink water or milk. But never give liquids to someone who is not awake or to those having a violent reaction to the poison. Next, seek help from professional medical experts. Save the material expelled from the mouth for doctors to examine. Save the container of the suspected poison to answer questions the doctors may have. The container may also describe a substance that halts the poison's effects. Use this substance without delay.
Health experts say vomiting sometimes may be started if medical advice is delayed. But vomiting should be used only when it is known the victim took too much of what is called a general poison, such as a medicine. The experts suggest never cause vomiting if the victim was poisoned by a petroleum product or by a substance that was a strong acid or strong alkali. These victims should be taken to a medical center as soon as possible.
(23)
A．Cleaning fluids.
B．Bums.
C．Unusual smell.
D．Milk.
听力原文：When did you get home yesterday？
(15)
A．I got home by bus．
B．I got home at ten o'clock．
C．I got home with my brother．
A．Because they like the design of the dresses
B．Because they like to wear different clothes
C．Because they prefer buying clothes at a low price
D．Because they need to look smart when looking for a job
When you buy some new clothes, what should you think of first？ ______
A．The kind of the clothes you really need.
B．Looking for the clothes on sales.
C．Finding the newest clothes.
D．How much money you can pay for the new clothes.
New Foods and the New World
In the last 500 years, nothing about people—not their clothes, ideas, or languages — has changed as much as what they eat. The original chocolate drink was made from the seeds of the cocoa tree (可可树) by South American Indians. The Spanish introduced it to the rest of the world during the 1500's. And although it was very expensive, it quickly became fashionable. In London, shops where chocolate drinks were served became important meeting places. Some still exist today.
The potato is also from the New World. Around 1600, the Spanish brought it from Peru to Europe, where it soon was widely grown. Ireland became so dependent on it that thousands of Irish people starved when the crop failed during the “Potato Famine (饥荒)” of 1845-1846, and thousands more were forced to leave their homeland and move to America.
There are many other foods that have traveled from South America to the Old World. But some others went in the opposite direction. Brazil is now the world's largest grower of coffee, and coffee is an important crop in Colombia and other South American countries.
But it is native to Ethiopia, a country in Africa. It was first made into a drink by Arabs during the 1400's.
According to an Arabic legend, coffee was discovered when a person named Kaldi noticed that his goats were attracted to the red berries on a coffee bush. He tried one and experienced the "wide-awake" feeling that one third of the world's population now starts the day with.
第 36 题 According to the passage, which of the following has changed the most in the last 500 years？
A．Food.
B．Clothing.
C．Ideology.
D．Language.
One can get a sunburn even________
A．when it is absorbed by matter
B．when it is cloudy
C．because they can pass through solid objects D when the sunrays are fierce
E．when a change in the nucleus of an atom takes place
F．when electron rearrangement takes place
A．feel happy to accept the job
B．overlook the important part of the story
C．get involved in the accident
D．feel no sympathy for the victim
