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【单选题】
气缸与活塞环之间的主要摩擦形式是( )。A.
液体摩擦
B.
边界摩擦
C.
干摩擦
D.
混合摩擦
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反馈参考答案：
举一反三
【多选题】When we introduce ourselves or other people, usually we talk about from the following aspects:
A.
occupation
B.
salary
C.
hobby
D.
hometown
【单选题】全国清洁生产审核的组织、协调、指导和监督工作的负责部门是（ ）。
A.
国家发展和改革委员会
B.
环境保护主管部门
C.
国家发展和改革委员会会同环境保护主管部门
D.
节能主管部门
【多选题】When we talk about a plan, we usually need to discuss the schedule, the main activities involved, etc. During discussion, we should consider each other's suggestions and make proper responses. It's OK...
A.
Shall we ...?
B.
Why don't we ...?
C.
What we should do is ...?
D.
The first thing to do is ...
E.
How about ...?
【多选题】When we talk about a plan, we usually need to discuss the schedule, the main activities involved, etc. During discussion, we should consider each other's suggestions and make proper responses. It's OK...
A.
When/Where shall we meet?
B.
Do we have to ...?
C.
Do you mean we should ...?
D.
It's OK.
【判断题】When we talk about cutting, it usually includes tree marking,delimbing,bucking and bunching.
A.
正确
B.
错误
【判断题】When we talk with a stranger, we usually use Sir when he is a man and Miss or Madam for a woman.
A.
正确
B.
错误
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