He has many different ways ______ that work. [ ]
A. to do
B. doing
C. does
答案:A
以下能够正确退出循环的是( )。
A.i=10 Do i=i+1 Loop Until i<10
B.i=1 Do i=i+1 Loop Until i=10
C.i=10 Do i=i+1 Loop Until i<0
D.i=1 Do i=i-3 Loop Until i=0
CRH5型动车组处于无电救援模式时制动系统应做哪些调整?