下列抗生素中孕妇禁用的是:()
A、青霉素
B、头孢呋辛
C、庆大霉素
参考答案:C
So far, how many digital cameras _____ in your shop?[ ]
A. are sold
B. will sell
C. sold
D. have been sold
墙体宽度为6,基底宽度为B的刚性条形基础,基础最小高度的计算式是()
A.(B-B./2tana
B.[(B-B./2tana]+0.1m
C.(B-B./tana
D.[(B-B./tana]+0.1m