滚齿机刀架立柱齿轮“卡死”产生原因及排除方法若齿轮装配时啮合间隙过小，应适当()。
A、增加润滑
B、减轻负荷
C、及时调整
D、加大间隙
参考答案：D
单词拼写。
1. We know there are 11 players in a football t_______.
2. The first day of the week is S________.
3. Li Lianjie is a reat action film s_______.
4. The basketball m_______ is Class 2 Vs Class 1.
5. Our school opens at 7:00 in the m_______.
6. There are seven ________(天) in a week.
7. What's your _______(计划) for summer holiday.
8. If you don't know it, please _______(问) me.
9. I give Lingling an ________ (邀请) to the cinema by sending her an email.
10. School is over. Let Tom _______(have) a break .
采用欺诈、威协等手段订立的劳动合同为()劳动合同。
A．有效
B．无效
C．可变更
D．可撤销
