当轴承采用油环带油润滑时,油环浸入油面的深度为油环直径的()左右。
A、1/12~1/8;
B、1/8~1/6;
C、1/6~1/4;
D、1/4~1/2。
参考答案:C
用所给单词的适当形式填空。
1. Look at the picture, Mr Hand ______ (sit) between Tom and Jim.
2. We want to ______ (shop) in the mall.
3. My uncle______ (leave) for Canada next Monday.
4. Here______ (be) a bag and a notebook.
5. You needn't ______ (take) these books to the classroom.
凡群众发现公安机关、公安民警有违法违纪或失职行为的,可以直接拨打“110”进行监督投诉。( )