But in Minnesota, USA, researchers study bears that are completely awake. The bears know the researchers voices and they are not afraid of die 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 sameto 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 arc quite different.
91. 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 s cientists D. not afraid of people
92. The word remove in the second paragraph probably means _____ in Chinese.
A. 拔下 B.移植 C. 清洗 D. 修补
93. Which of the following ma y NOT be 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.
94. In the Minnesota studies, researchers _____.
A. can never get close to the bears
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