What is the main idea of the passage？
A. Green bananas are very useful fruit.
B. People living in small villages are usually very kind.
C. People should go out to see the whole world very often.
D. One should understand the world from different perspectiv
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Which of the following is palatal affricate？
A. [dV]
B. [F]
C. [V]
Which of the following is true with disapproved drugs？
A. There is nothing to prove that such drugs are not safe.
B. It is affirmative that such drugs are ineffective and dangerous.
C. Physicians do not intend to use such drugs.
D. Such drugs have never been tested by FDA.
"Juggling one's life" probably means living a life characterized by______.
A. non-materialistic lifestyle
B. a bit of everything
C. extreme stress
D. anti-consumerism
在CRC码中，接收端检查出某一位数据出错后，一般采用的纠正方法是()。
A. 请求重新发送
B. 删除数据
C. 判断余数值由接收端自行纠
D. 以上均可
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