芒硝入汤剂,其用法是( )
A.包煎
B.先煎
C.另煎
D.冲服
E.后下
参考答案:D
Mr. Han is very old and he can’t______himself. So he lives with his children now.
A.look at
B.look after
C.look like
D.look for
对浅层的()油层,因水窜浸蚀,造成地层坍塌使油井停产。
A、白云岩
B、砂岩
C、碳酸盐岩
D、火成岩