敞车侧墙板内凹、外胀大于()时调修。
A.10mm
B.20mm
C.30mm
D.50mm
参考答案:C
We see the lightning ____ it happens, but we hear the thunder later.
A.the moment
B.for the moment
C.at the moment
D.in a moment
以下哪项属于链球菌感染证据:()
A.瓣膜病
B.皮下结节
C.ASO大于500U
D.血沉增快
E.心电图可见ST段下移及T波平坦或倒置