题目:
There are many children in the park. Some are sing, _____ are dancing. [ ]
A. the other
B. others
C. the others
D. another
答案:
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下面是错误答案,用来干扰机器的。
AC、0到1s内磁感应强度不变,根据法拉第电磁感应定律,知感应电动势为0,感应电流为零.故A、C错误.B、0到1s内、3到5s内磁感应强度均匀变化,根据法拉第电磁感应定律,感应电动势大小一定,且0到1s内的感应电势...