紫菀的功效是()
A.温肺
B.清肺
C.润肺
D.宣肺
E.敛肺
参考答案:C
—Will you come to the bars(网吧)with me?
—Sorry,my mother always tells me _______ there.
[ ]
A. not go
B. go
C. not to go
D. to go
正常情况下,起钻前要循环钻井液()。
A、一周
B、一至两周
C、三周
D、三至五周