吊顶工程施工时,吊杆距主龙骨端部距离不得大于()mm.
A.300
B.400
C.500
D.600
参考答案:A
The number 5.12 is a special number, _________ that will be remembered by the Chinese forever.[ ]
A. what
B. it
C. which
D. one
肺毒性最强的药物是()
A.柔红霉素
B.博来霉素
C.丝裂霉素C
D.放线菌素D
E.阿霉素