美国关于在日本本土部署核武器的构想,其弊端是()。
A.耗资巨大
B.远程控制难度高
C.需要与日本进行事前协商
D.对日本国民安全构成了威胁
参考答案:C
Fear is something that you are born with. You can't ____ yourself of it completely but you can ____ certain
fears under certain conditions. [ ]
A. break; get rid of
B. get; overcome
C. overcome; rid of
D. rid; overcome
供水设计选择管径时,为保证管道的使用寿命和经济节约两项指标,应考虑经济流速的选取,小于400mm管径的管道其经济流速的选择值是()。
A、0.4~0.6m/s
B、0.6~0.8m/s
C、0.6~1.0m/s
D、0.8~1.2m/s