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North American black bears are shy anima...

    North American black bears are shy animals. They are fearful by nature, and will usually run away if they see or hear people. Because of this, it can be difficult for scientists to learn about these animals.

In order to study black bears, researchers from New Jersey, USA, catch bears and use drugs(毒品)to help them go to sleep. Researchers then work out the size and the weight of the bear, take blood to test for diseases(疾病), remove a tooth and take it to the lab to find out its age. From these studies, researchers want to find out how many bears live in New Jersey, how long they live, and how many babies they produce.

But in Minnesota, USA, researchers study bears that are completely awake. The bears know the researchers’ voices and they are not afraid of the research team. With the help of a few grapes to keep the bears busy, researchers can touch them to check their hearts, look at their teeth, and do other jobs. Researchers can also walk or sit with bears for hours and make videos to learn about their everyday lives.

In both places, the main purpose is the same— to make sure there is a healthy population of black bears. But the research methods and the kinds of information that researchers are able to collect are quite different.

1.In the first paragraph, we can learn that North American black bears are ______.

A.shy and fearful animals B.not found today

C.well known to scientists D.not afraid of people

2.The word “remove” in the second paragraph probably means ________.

A.pull out B.clean up C.fix up D.pick out

3.Which of the following is NOT included in the New Jersey studies on bears?

A.The age.

B.The way of their communication.

C.The weight.

D.The number of babies they produce.

4.What do the two studies have in common?

A.Research places. B.The main purpose.

C.Research methods. D.Collected information.

 

1.A 2.A 3.B 4.B 【解析】 本文介绍了新泽西州和明尼苏达州的研究者对北美黑熊的研究目的相同,但是研究方法和获取信息的方式是不同的。 1. 细节理解题。根据短文第一段“North American black bears are shy animals. They are fearful by nature, and will usually run away if they see or hear people.”可知北美黑熊是胆小害羞的动物,故选A。 2. 词义猜测题。根据“take it to the lab to find out its age”可知拔出牙齿才能带到实验室查明它的年龄,所以remove的意思为“拔出”。pull out拔出;clean up清理干净;fix up修理;pick out选出。故选A。 3. 细节理解题。根据第二段可知在新泽西州的研究中,包括了通过黑熊牙齿测出其年龄,算出黑熊的体重和大小,产多少幼崽等,没有提及交流方式,故选B。 4. 细节理解题。根据最后一段“In both places, the main purpose is the same— to make sure there is a healthy population of black bears.”可知这两个地方的实验目的是相同的——确保黑熊的健康数目,故选B。
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D.Because he didn’t want to work.

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