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问题 选择题

下列用品中，通常情况下属于绝缘体的是：[ ]

A．塑料直尺

B．铅笔芯

C．铁制铅笔盒

D．金属小刀片

答案

答案：A

选择题
He expressed his hope _____ he would visit Beijing again the next year, and this was the very hope _____ he expressed as soon as he arrived in the city.

A. that; that
B. which; which
C. that; which
D. which; that
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单项选择题

观察右边的示意图。引起1760年以后图示棉花输入变化的主要原因是（）

A.棉纺织业中手工工场大量建立

B.棉纺织业逐步采用大机器生产

C.轮船、火车等交通工具的采用

D.海外市场的不断扩大
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