参考答案:D
本题考查的知识点为判定函数单调性。
由于y=x3-3x的定义域为(-∞,+∞),且y′=3x2
第36题:[判断题]无列检作业的始发列车发车前应进行自动制动机的简略试验。
A.正确
B.错误
参考答案:A
第37题: [单项选择]The author suggests that______.
A. poetry tends to make the reader disappointed
B. poetry makes its readers sentimental
C. poetry is more important than words
D. poetry often captures real human feelings
参考答案:D
答案解析:本题考查考生是否读懂了第一段中的一个长句子:It is easy to become frustrated by words—in poetry or in life—but when words r
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