基孔制间隙配合是（），过盈配合的轴是（）.
A.a~h
B.js~n
C.r~zc
参考答案：A, B
It's freezing outside. You _______ put on your overcoat. [ ]
A. had better to
B. had better
C. would better
D. would better to
下列关于五四运动的说法，正确的是 ( )
A．它是中国国近代史的开端
B．它标志着中国新民主主义革命的开始
C．它在客观上促进了中国资本主义的发展
D．这次运动的主力是学生
eezing outside. You _______ put on your overcoat. [ ]