当消费增加时,IS曲线()
A.向左平行移动
B.向右平行移动
C.转动
D.不动
参考答案:B
With so much homework to do, _________to play football.
A.there is no time
B.there are no time
C.I have no time
D.it is too busy
普通型携带式电气测量仪表必须在什么地方使用?