采用机械通风散气,散气时间一般为();采用自然通风散气,散气时间一般为5d~7d。
A.1d~3d
B.3d~5d
C.5d~7d
D.7d以上
参考答案:B
The newly-married couple quarreled so much that they reached the point _______ they had to separate from each other.
A.when
B.where
C.which
D.that
诊断AMI的最佳血清酶学指标是()
A.AST
B.ALT
C.LDH1
D.CK
E.CK-MB