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
