接岸电时，岸电主开关合上又自动跳开，首先可能的原因是（）
A.相序接错或断相
B.有短路
C.过载
参考答案：A
— How do you find the new book by JK Rowling?
—__________. I guess she is out of her talent.
A．With the help of my mother.
B．By accident.
C．Very boring
D．In the library.
超声声像图上膀胱与直肠间的两个袋状低回声结构是（）
A.附睾头
B.前列腺
C.精囊腺
D.睾丸
E.输精管
