政府预算平衡时，若MPC=4/5，政府购买增加100万元，则国民收入()。

假设有下面程序段：inta；floatb;b=a=4.5;下面错误的描述是

Theyspendsometime()thisquestion.

MrBrownhasjustgraduated(）university.

What'sthemeaningoftheword"stay"?

Workhard,(),youwillhaveabrightfuture.

What'sthemeaningoftheword"piano".

what'sthemeaningof"写日记"?

what'sthemeaningof"令人高兴的"?

what'sthemeaningof"introduce"?

what'sthemeaningof"愉快"?

what'sthemeaningof"beach"?

what'sthemeaningof"unique"?

what'sthemeaningof"capital"?

what'sthemeaningof"touristattraction"?