学校首届教师节是()年
A. 1985
B. 1987
C. 1988
D. 1989
给水泵振动应小于()。
A. 0.3mm
B. 0.03mm
C. 0.5mm
D. 0.05mm
Henry and Tom()to the particles at the Trade Union every Saturday.
A. used to go
B. were used to go
C. are used to go
D. ues to go
亚运会自第二届(1954年)开始。每()年举行一届,会期不超过()天。