在牛头刨床上刨削时,刨刀的()为主运动。
A.横向运动
B.纵向运动
C.往复直线移动
参考答案:C
用所给词的正确形式填空(本部分共5小题,每小题1分,共5分)
小题1:In winter, it often _______.
小题2:This hotel is ______________,we can find a clean one.
小题3:Don’t play soccer in the street.It’s ________.
小题4:I will go to the _________ to meet my parents.They will get here by plane.
小题5:We often have no classes _______________the weekend.
国民革命军北伐的主要对象是
①张作霖 ②袁世凯 ③孙传芳 ④吴佩孚 [ ]
A.①②④
B.②③④
C.①③④
D.①②③