电荷有规则的移动叫()。
参考答案:电流
As ______ tourist attraction, the Summer Palace does have _______ strong attraction to visitors from home and abroad.
A.the; /
B.the; a
C.a; /
D.a; the
效果好坏主要取决于教师和演讲者的教育电视节目类型是()
A.辅导型
B.讲授型
C.图解型
D.表演型