变频控制柜的显示窗“1”位是()调节。
A.电压
B.电流
C.频率
D.时间
参考答案:C
.I want to buy a rope which is _____________this one.
A.twice as longer as
B.as twice long as
C.twice the length of
D.as twice as
学校买来一批练习册,分给24个班,每班46本,还剩434本,学校买来多少本练习册?