原始开工时三乙基铝系统液位开关联锁调校可用（）.A、水 B、白油 C、三乙基铝 D、

多多的父母嫌弃她是个女孩儿，出生后就将她寄养在外婆家，很少过问，也不负担抚养费。随着多多一天天长大，外婆家的生活越来越困难。多多长大懂事了，自己向父母要抚养费，可他们总是搪塞推诿。

根据材料回答：

（1）多多父母的做法对吗？为什么？

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（2）多多应该怎样维护自己的合法权利？

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危险化学品单位应当制定本单位事故应急救援预案，配备应急救援人员和必要的应急救援器材和设备，并( )。

A．实施监督

B．制定安全责任制

C．定期组织演练

D．进行培训

You may picture firefighters holding a hose （水管） outside of a burning building，but the Golden Eagles Hotshots don't fight fires quite that way．When they go into action，you may not even see a fire truck．

The Hotshots are firefighters who battle fires in wilderness areas．But don't think you'll only find them in California．Wherever there is a national wildfire emergency，the Golden Eagles Hotshots could be there．

But these firefighters don't work the same way as those in big cities．They work where there are large numbers of trees，bushes，and grass．They climb up and down steep hills to clear brush and burnable debris （残骸）．They sometimes use water，but often fight fire with fire！

They do that by lighting what are called “backfires” ---- small，controlled fires that burn up fuel in the path of larger wildfires．That way, when the wildfire gets there, it has nothing to burn and nowhere to go，because all the burnable fuel has already gone up in smoke．

The Hotshots also clear away fuel using old-fashioned hard work．For example，they use a saw to cut away trees and heavy brush that could catch fire．

Of course there are times when the Golden Eagles Hotshots do have trucks to supply water to the fires．But the water is limited，and these guys have to rely on hard work more than anything．Physical fitness is very important．They have to be strong to handle steep hills while carrying a 60­pound pack．

Thanks to their efforts，many lives have been saved，many houses not burned，and countless trees still standing．

小题1:According to the passage，why do the firefighters light “backfires”？

A．To signal for help．

B．To remove obstacles．

C．To protect trees and bushes．

D．To prevent the fire from spreading．小题2:What can we learn about the Golden Eagles Hotshots？

A．They are firefighters working in big cities．

B．Their work requires physical strength．

C．They are working for free．

D．They usually hold a hose to put out the fires．小题3:All of the following can reflect that the Golden Eagles Hotshots are special  EXCEPT their working 　　　　．

A．areas

B．ways

C．achievements

D．tools小题4:What is the author's attitude towards the Golden Eagles Hotshots？

A．Appreciative．

B．Doubtful．

C．Worried．

D．Critical．

资源税纳税申报表主要按( )进行区分填列。

A．矿产品和盐

B．免税项目和应税项目

C．自己申报与代扣代缴资源税

D．从价征收和从量征收

Duroziez双重杂音最常见于

A．主动脉瓣狭窄

B．主动脉瓣关闭不全

C．二尖瓣狭窄

D．肺动脉瓣狭窄

E．肺动脉瓣关闭不全