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【简答题】
试证明： 设f(x)是定义在区间[a，b]上的单调函数，则f(x)是[a，b]上的可测函数.
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举一反三
【判断题】A good handshake should be short accompanied by a smile and sincere, warm eye contact. Besides this, smile does not have other function.
A.
正确
B.
错误
【单选题】According to the passage, a smile and handshake show ______________.
A.
welcome
B.
congratulations
C.
apology
D.
无
【简答题】Body language refers to expressions and body movements. It is an important way of communication apart from__20__. A smile and handshake show welcome. Nodding the head means agreement, while shaking it...
【判断题】You should greet the interviewer with a smile and offer a firm handshake.
A.
正确
B.
错误
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