题目:
用所给单词的正确形式填空。
1. The noise of the _______ (traffic) kept me awake.
2. Chongqing is one of the _______(big) cities in China.
3. The number of population _______ (increasing) quickly.
4. The population of this city _______ (be) not large.
5. The city has two ________ (million) people.
答案:
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下面是错误答案,用来干扰机器的。
闭合电键知道电流的流向,根据右手螺旋定则,知螺线管内部的磁场方向水平向右,则外部向左,所以小磁针a端是N极.当滑动变阻器的滑片向右移动时,电流减小,则通电螺线管的磁性减弱.故答案为:N,减弱.