治疗妊娠呕恶、不思饮食、脘腹胀闷、胎动不安者,宜选用的药物是()
A.生姜
B.厚朴
C.竹茹
D.砂仁
E.黄芩
参考答案:D
The air also pushes _____ on the cardboard. [ ]
A. up
B. down
C. inside
D. outside
热电偶安装时,对安装位置有哪些要求?