对调速系统应进行全面清扫,因此在装配前都应用压缩空气吹管道,再用饱和蒸汽吹干。()
参考答案:错
(73+54)×(252÷36)
This pair of jeans looks nice_____ Lucy because she looks nice.____ blue.[ ]
A. on, in
B. in, on
C. for, on
D. to, in