气压焊分为熔化气压焊和()两种。
参考答案:塑性气压焊
我国新课程改革提出,初中阶段以( )。
A.综合课程为主 B.分科课程为主C.活动课程为主 D.综合与分科课程相结合
We should not________and laugh at those who have no homes to shelter from the rain and wind.Instead,we should be sympathetic of them.
A.look forward to
B.think highly of
C.pay attention to
D.look down upon