师生认知

自动喷水灭火系统调试应具备下列条件（）以及湿式系统管网内已充满水，干式系统、预作用系统管内的气压符合设计要求，阀门均无泄漏。

A、消防水池、消防水箱已储存设计要求的水量

B、系统供电正常

C、消防气压给水设备的水位、气压符合设计要求

D、与系统配套的火灾自动报警系统处于工作状态

阅读理解

     Our boat floated on between walls of forest. It was too thick to allow us a view of the land we were

passing through, though we knew from the map that our river must from time to time be passing through

chains of hills which crossed the jungle plains. Nowhere did we find a place where we could have landed: where the jungle did not actually spread right down into the river, banks of soft mud prevented us form

going ashore. In any case, what would we have gained by landing? The country was full of snakes and

other dangerous creatures and the jungle was so thick that one would be able to advance slowly, cutting

one's way with knives the whole way. So we stayed in the boat, hoping that when we reached the sea, a

friendly fisherman would pick us up and take us to civilization.

     As for water, there was a choice. We could drink the muddy river water, or die of thirst. We drank the water. Men who have just escaped from what appeared to be certain death lost all worries about such

small things as diseases caused by dirty water. In fact, none of us suffered from any illness as a result.

    One day we passed another village, but fortunately nobody saw us. We did not wish to risk being taken prisoners a second time: we might not be so lucky as to escape in a stolen boat again.

1. It can be inferred from the passage that the only thing they could see in a boat was __________.

A. tall trees

B. chains of hills

C. walls

D. vast land

2. From the passage, we can learn that __________.

A. they hoped that a friendly village might help them

B. they did something wrong so they were put into prison

C. They drank the muddy river water out of thirsty

D. they were on a journey home

3. They didn't land because __________.

A. they were lost without a map

B. landing was of little help

C. the jungle did not actually spread right down into the river

D. they were afraid of the snakes and other dangerous animals in the jungle

4. Which of the following statements is true?

A. They stole a boat and tried to escape from an uncivilized world.

B. They ware taken prisoners for a second time.

C. They cut their way in the jungle with knives the whole way.

D. They were careful so none of them suffered from any illness.

5. The best title for this passage might be __________.

A. The Problem of Landing

B. An Adventure along the River

C. An Entirely New Experience    

D. An Escape in the Jungle

我国的耕地分布在______．

下面哪一位在1844年提出了异化的问题（）

A、马 * *

B、斯大林

C、列宁

D、马克思

失控是指汽车总成或机构工作时出现操纵（）无法控制的现象。

A.失效

B.失灵

C.失真