加厚料层可消除沟流。
参考答案:对
—What do you think of Wu yanzu ?
—He is very handsome . I know he played ______in a film directed by a famous director . [ ]
A. a leader role
B. a lead role
C. a supporting actress
D. a supporter
政府预算盈余等于()。
A、净税收减去政府在产品和服务上的支出
B、政府对产品和服务的支出减去投资
C、消费支出减去净税收
D、以上选项都不正确