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问题 选择题

下列属于北温带和热带分界线的是[ ]

A．南极圈

B．南回归线

C．北回归线

D．北极圈

答案

答案：C

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

图l为初中物理教学中常用的一种实验装置示意图。置于马蹄形磁铁中的导体两端用外部绝缘的细导线悬挂起来，且与灵敏电流计、开关串联组成闭合电路。该实验在教学中用于说明（）。

A.安培力

B.电磁感应现象

C.电动机原理

D.电功和电功率
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