砒石的内服剂量是()。
A.0.05~0.1g
B.0.015~0.03g
C.0.002~0.004g
D.1.5~3g
E.0.01~0.05g
参考答案:C
正常关节腔积液中可见下列细胞,但除外的是()
A.红细胞
B.单核巨噬细胞
C.淋巴细胞
D.中性粒细胞
E.软骨细胞
In order to have a good _______ of English, he decided to go abroad for further education.
A.command
B.need
C.master
D.direction