试题与答案

压缩空气泡沫消防车出现拉动真空泵手柄无反应,电线皮烧坏的原因是()。 A.真空泵接地

题型:单项选择题

题目:

压缩空气泡沫消防车出现拉动真空泵手柄无反应,电线皮烧坏的原因是()。

A.真空泵接地不好,搭铁不实

B.未安装空气开关泡沫管单向阀

C.液位传感器液体接触孔内被堵住

D.出水压力传感器损坏,不能发出正确的信号

答案:

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题型:选择题

已知25℃时有关弱酸的电离平衡常数:

弱酸化学式CH3COOHHCNH2CO3
电离平衡常数(25℃)1.8×l0-54.9×l0-10K1=4.3×l0-7

K2=5.6×l0-11

 

则下列有关说法正确的是

A.向醋酸溶液加水稀释时,醋酸的电离平衡逆向移动。

B.等物质的量浓度的各溶液pH关系为:pH(NaCN)>pH(Na2CO3)>pH(CH3COONa)

C.a mol/L HCN溶液与b mol/L NaOH溶液等体积混合后,所得溶液中c(Na)>c(CN),则a一定大于b

D.相同浓度的CH3COONa和KCN溶液中c(Na+-)- c(CH3COO-)小于的c(K+) -c(CN)

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题型:完形填空

第二节 (共5小题;每小题2分,共10分)

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

The wife-carrying World Championship has been celebrated in a small town in central Finland since 1992. In 1992, the people of the town decided to restart some long-forgotten traditions.  71  He was said to only accept men as members of his gang who proved their worth in challenges. At that time, it was also a common practice to steal women from neighboring villages.

72   A large number of competitors, people, and journalists from Finland to Canada attend the Wife-carrying World Championship every year.

73    The Wife-carrying World Championship is held on a 253.3 meters long official track. The track has two dry obstacles and a water obstacle, about a meter deep. The wife to be carried may be your own, or your neighbor’s. The minimum weight of the wife to be carried is 49 kg. If she is less than 49kg. If she is less than 49kg, the wife will be given a heavy bag to carry. Each time a competitor drops his wife, that couple will be fined 15 seconds.  74 

Alongside with the Wife-carring World Championship, there is also a team competition. The distance is the same but three men in the team carry the wife in turns. At the exchange point the carrier has to drink official “wife-carrying drink.” Then he may continue the race.  75 

While the Wife-carrying World Championship is being held, there are bands playing music, a wife carrying dance and other forms of entertainment.”

A.There are a few basic rules.

B.People everywhere hold the event.

C.A special prize is awarded to the team.

D.Do you know how these traditions restarted? E.This event is becoming increasingly popular.

F.The winner is the couple who complete the course in the shortest time.

G.Back in the late 1800s, there was a robber called Rosvo-Ronkainen in that area.

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