问题 多项选择题

下列选项中,对于水喷雾灭火系统的说法正确的是()。

A.该系统不仅能够扑救固体火灾,同时由于水雾自身的电绝缘性及雾状水滴的形式不会造成液体火飞溅,可用于扑救电气没备或可燃液体发生的火灾

B.水喷雾灭火系统主要用于保护火灾危险性大,火灾扑救难度大的专用设备或设施

C.当保护对象有很大开口或无法形成密闭空间的场所可采用该系统灭火

D.由于水喷雾具有的冷却、窒息、乳化、稀释作用,使该系统的用途广泛,不仅可用于灭火,还可用于控制火势及防护冷却等方面

答案

参考答案:A, B, D

解析:

(1)水喷雾灭火系统的特点及使用范围。

适用范围:该系统不仅能够扑救固体火灾,同时由于水雾自身的电绝缘性及雾状水滴的形式不会造成液体火飞溅,可用于扑救电气设备或可燃液体发生的火灾。

保护对象:水喷雾灭火系统主要用于保护火灾危险性大,火灾扑救难度大的专用设备或设施。

用途:由于水喷雾具有的冷却、窒息、乳化、稀释作用,使该系统的用途广泛,不仅可用于灭火,还可用于控制火势及防护冷却等方面。

(2)水喷雾灭火系统的组成。

固定式水喷雾灭火系统一般由高压给水设备、控制阀、水雾喷头、火灾探测自动控制系统等组成。

离心雾化型水雾喷头适用于扑救电气火灾及保护电气设施的场合。

材料分析题

七年级学生小刚放学后,在校外遭到几名社会青年的勒索。这几名社会青年强行将小刚身上的钱搜走,并要求他每天一放学都要在校外指定的地方交出30元钱。小刚又气又怕,决定找同学商量怎么办。

同学甲:“我们一起凑钱给他们,免得他们再找你麻烦。”

同学乙:“找几个朋友去教训他们一下。”

同学丙:“我们应该依法维护自己的合法权益。”

(1)以上三位同学的说法对吗?请分别说明理由。

                                                                                                                                                             

                                                                                                                                                              

                                                                                                                                                              

(2)如果你是小刚的同学,请你帮助他想出解决问题的方法。(至少2条)

                                                                                                                                                              

完形填空
One year ago, I traveled 15,000 kilometers from Australia to the US. I am from a beachside town in the   16  of Sydney, and thought there would be almost no   17  differences between my home country and my 18  . I was surprised at how wrong I was, and at  19  different the two countries could be.
The United States is   20  in almost every aspect. The buildings are gigantic (巨大的) and so are the people who   21  and work in them. At mealtimes, the portions (份额) often   22  to me to be big enough for three or four people. I once   23  a baked potato which turned out to be bigger than my head! This was a big   24  for me.
The longer I spent in the US, the more I started to   25  smaller differences like the culture of   26  in restaurants. In Australia we don’t tend to give a tip   27  the service has been really excellent. In the US you tip for   28  everything, even at the hairdresser. Waiters and shop assistants   29  to be given 15 percent of the bill, although in places   30 New York or Washington DC, a tip can be as much as 20 percent.
  31 , I also became more wary (谨慎的) of believing the stereotypes (成见) I had heard at home as I traveled. Not all Americans are ignorant of geography, for example.
Despite this, certain stereotypes about places did seem to   32  true for me. There is an immense (强烈的) sense of speed in New York. Everyone   33  to and fro, and very seldom takes time to   34  the moment. This is very different from the Australian lifestyle. Australians are laid back. Even in a major city like Sydney, we “Aussies” take time to “stop and smell the roses”---very different from our American counterparts.
Navigating (驾驭) the culture divide between Australia and the US was challenging at times. But I took up that   35  and learned a lot from it. It was an adventure.
小题1:
A.heartB.cityC.centerD.suburbs
小题2:
A.culturalB.commercialC.economicD.scientific
小题3:
A.home townB.departureC.locationD.destination
小题4:
A.howB.whyC.howeverD.where
小题5:
A.bigB.modernC.smallD.fashionable
小题6:
A.travelB.surviveC.liveD.serve
小题7:
A.happenedB.seemedC.provedD.managed
小题8:
A.broughtB.orderedC.designedD.fetched
小题9:
A.laughterB.pleasureC.shockD.embarrassment
小题10:
A.preferB.noticeC.tellD.appreciate
小题11:
A.servingB.tippingC.donatingD.toasting
小题12:
A.unlessB.ifC.whenD.since
小题13:
A.rarelyB.mostlyC.almostD.hardly
小题14:
A.tryB.waitC.thinkD.expect
小题15:
A.likeB.alongC.forD.in
小题16:
A.SoB.ThereforeC.HoweverD.But
小题17:
A.comeB.becomeC.turnD.get
小题18:
A.walksB.drivesC.wandersD.rushes
小题19:
A.depend onB.reflect onC.spy onD.watch on
小题20:
A.experienceB.jobC.challengeD.business