线圈中感生电动势的大小与线圈中磁通的()成正比,这个规律称为法拉弟电磁感应定律。
A、强度
B、多少
C、变化量
D、变化率
参考答案:D
A terrible earthquake with tsunami happened in Japan, more than 10,000deaths.
A.causing
B.to cause
C.caused
D.having caused
From the _____ expression on her face, we knew that she was very _____ with the result.
A.exciting; pleasing
B.exciting; pleased
C.excited; pleased
D.excited; pleasing