一般精度要求的主轴机构装配时，必须采用定向装配法。
参考答案：错
The Grand Theatre is located on one corner of ________ is called the People's Square.
A．which
B．what
C．the place
D．that
乳化液泵站和液箱紧固件滑动轴承温度不超过（）℃。
A.55
B.65
C.75
D.85
