在停止水泵运行时，如果将压水管闸阀缓慢关闭，也是引起水锤发生的原因之一。

Mary didn’t understand such sentences as“She is blue today”，“You are yellow”，“He has a green thumb”，“He has told a white lie”and so on．And she went to the teacher Mrs James for help．

Mary：Mrs James，there is a colour in each of the sentences．What do they mean?

Mrs James：In everyday English，Mary，blue sometimes means sad，yellow afraid．A person with a green thumb grows plants well and a white lie is not a bad one．

Mary：I’m afraid I don’t understand them a11．Would you give me an example for“a white lie”?

Mrs James：Certainly．Now I just give you some cakes．In fact you don’t like it，but you don’t want to let me know it．Instead you say，“No，thanks．I’m not hungry．”That’s a white lie．

Mary：It sounds very interesting．Thanks very much．

Mrs James：You are welcome．Colours are meaningful．I think you will meet more sentences like these in the future．Please come to me if you have any questions．

小题1:Blue sometimes means sad in________English．

A．good

B．spoken

C．usual

D．poor小题2:I don’t have a green thumb，so all my plants________．

A．die off

B．grow well

C．look nice

D．are good小题3:David is yellow and he is________to climb the tall tree!

A．happy

B．clever

C．brave

D．afraid小题4:He didn’t like me to know________of the accident．He told me a white lie at last．

A．the reason

B．the true story

C．the meaning

D．the answer小题5:He is ________today．He is told that his father is seriously ill．

A．blue

B．yellow

C．green

D．white

宗地图主要描述的内容有（）。

A.宗地位置

B.界址点线

C.测量坐标

D.相邻宗地关系

E.相邻街坊关系

《关于加强森林病虫害防治药剂药械管理的意见》强调，加强药剂药械的管理，有利于提高防治（），加大防治（）；有利于扭转当前（）的局面，实现对森林病虫害的可持续控制。

哪个断面的上、下汽缸温差变化最大？

煤气压力及流量波动的原因和故障处理？