— _________ is your ruler?
—It's blue.[ ]
A. What
B. What's color
C. How
D. What color
答案:D
井下道床厚度不小于10cm,个别底板突出处不小于()cm。
A.5
B.7
C.10
川贝母与浙贝母均具有的功效是()
A.清肺养阴止咳
B.温肺化痰止咳
C.泻肺化痰止咳
D.燥湿化痰止咳
E.清热化痰止咳