片剂内的空气既不能多,也不能少,空气多易产生(),空气少则导致()。
参考答案:松片;崩解迟缓
Tom ____ there for 10 months since he ____ back to his hometown.[ ]
A. has lived, gets
B. has lived, got
C. lived, go
D. lived, has got
我国常见的咯血原因()
A.肺结核
B.肺吸虫
C.肺梗死
D.肺淤血
E.肺癌