跨局运用的客运机车、动车组,对CIR设备实行()检查;跨局运用的货运机车,对CIR设备可实行入库故障修。
参考答案:逐台入库
— Has your former classmate come back from America?
— Yes , he________there for eight years.[ ]
A. has stayed
B. stays
C. stayed
D. had stayed
读下面水循环示意图,完成12-14题。
小题1:图中环节①的名称是:
A.蒸发
B.水汽输送
C.降水
D.径流输送小题2:下列环节能形成水循环的一组是:
A.①③
B.②③
C.①④
D.①②小题3:在水循环的各个环节中,人类活动影响最大的环节是:
A.①
B.③
C.④
D.⑤