为了安装或检查故障方便,应采用电气接线图。()
参考答案:对
As is known to all, the United States uses energy as the whole of Europe.[ ]
A. as twice
B. twice much
C. twice as much
D. twice more
执行语句for(i=1;i++<4;);,后变量i的值是
A.3
B.4
C.5
D.不定