隔蒜灸在临床上一般适用于
A．久治不愈的哮喘B．慢性胃肠疾病C．肺痨D．急性寒性腹痛E．命门火衰之阳痿早泄
参考答案：C
You can imagine what great trouble they have________the problem________. [ ]
A. to solve; being talked about
B. solving; discussing
C. to solve; to talk about
D. solving; being discussed
一个人在峡谷中大声呼喊后听到了回声，他是在声音发出后3秒钟听到的回声，问反射声音的峭壁离发声的人多远？（当时空气的温度是15℃左右）
