交流电的三要素是什麽?
参考答案:
最大值,周期(或频率),初相位。
The order came the soldiers the small village the next morning.
A.that; had to leave
B.that; should leave
C./; must leave
D.when; should leave
出版者的下列行为中哪些应当经作者许可?()
A.图书出版者对作品进行修改
B.图书出版者对作品进行删节
C.报社、期刊社对作品内容进行修改
D.报社、期刊社对作品作文字性修改