遗精日久可产生哪些变证()
A.早泄
B.虚劳
C.阳痿
D.淋证
E.不育
参考答案:A, B, C, E
微生物生态系统是指()组成的具有一定结构和功能的开放系统。
—May I come in? I’m sorry I’m late.
— Come in, please. But could you please tell me _______________?
A.why you are late again
B.what were you doing then
C.who you talked with
D.how do you come to school