质量为m的探月航天器在接近月球表面的轨道上飞行，其运动视为匀速圆周运动。已知月球质量

施工成本管理的基础工作内容是多方面的，成本管理的（）是其中最根本、最重要的基础工作。

A．动态控制

B．纠偏控制

C．责任体系的建立

D．成本计划的组成

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     I know how easy it is to start smoking and how difficult it is to stop. During adolescence, I became

   1   to cigarettes. When l was young, I didn't know that it could do   2   to my heart and lungs. Neither

did I know that my cigarette smoke could affect the   3   of non-smokers. However, what I did know was that my girlfriend thought I smelt terrible and that she wouldn't go out with me again   4   I stopped. 1 also noticed that I became breathless quickly. Then I knew   5   was time to quit smoking. I'm sending you

some advice to help you__6  your resolve. Every time you feel like   7  (smoke), remind yourself that you

are a non-smoker. I know it is not easy to get rid of the __8__, but millions have managed   9_ (quit) and

so can you. Keep trying, and you will   10   eventually.

"症状"的概念是（）

A.五脏

B.疾病过程中出现的症状

C.疾病的名称

D.气血

E.疾病过程中某一阶段的病理概括

什么是多冲量控制系统？

正常条件下，采煤工作面防突钻孔超前距最小应保留（）米。

A、1.0

B、2.0

C、3.0