注册造价工程师在每一注册期内应当完成的继续教育学时数为()学时。
A.60
B.120
C.180
D.240
参考答案:B
关于乙烯的化学性质,说法正确的是
A.不能发生聚合反应
B.能使溴水褪色
C.可与H2发生加成反应
D.可与HCl加成
For all the remaining items the stated dates of delivery are approximate, but () would these dates be exceeded by more than ten days.
A. in no case
B. in any case
C. under any circumstances
D. by all means