经前期紧张症多发生在
A．青春期
B．育龄期
C．更年期
D．不孕症患者
E．月经失调者
参考答案：B
---Must I finish my homework at school?
--- ?You can do it at home and hand it in next week.
A. Yes, you must B. No, you needn’t C. Yes, I can
如何对断路器进行验收？
