问题 问答题 简答题

冲击式除尘器在运行操作中的注意事项是什么?

答案

参考答案:

(1)除尘器应先于输煤皮带启动前1min运行。输煤皮带停止后1min再停除尘器。 

(2)必须经常到除尘器旁观察运行情况,特别注意水位情况,严格控制进水量。 

(3)除尘器下部有排污控制阀,运行结束后必须排污一次,或视含尘气体入口浓度大小、(4)气温高低增加排污次数,排污后应立即放水,达到水位线。 

(5)除尘器设有就地紧急停机按钮,在遇有威胁设备或人身安全的情况时,应立即停止设备运行。 

(6)运行中严禁打开检查门,以免发生事故。 

(7)严禁发生超水位或严重低水位运行。

阅读理解

It may be the happiest place on Earth, but the Magic Kingdom has become a little more restrictive(限制的) for the children hoping to enjoy Disney’s US parks on their own. Beginning on March 23 of this year, anyone under the age of 14 must go there with someone over 14. If a worker who works at the front gates sees a child who looks younger than 14 without a person who looks older than that, he will have a talk with the tourist. If he is sure the tourist is under 14, his parents will be contacted to pick them up.

Before this, Disney did not have any age restrictions(限制) for tourists. The new rule was set up after Disney conducted a survey of its tourists and contacted various child welfare association(福利机构). They both thought it was necessary to have the age requirement. The American Red Cross suggested that 14 is the minimum(最小的) age for babysitters(保姆).

News of the age restriction comes nearly a week. A child on vacation with his father and mother fell into a pool and died at Disneyland Pop Century Resort(度假村). Anthory Johnson was swimming in the hotel pool with a group of children including his little brother and a cousin at about 9:30 pm when the accident happened. Witnesses said the teen was playing in the water on Sunday evening without family members. A cousin found him under water around 9:10 pm and told others in the group who pulled him out of water. Orange Country Sheriff’s officials said after Anthony was taken to nearby hospital, he died several days later.

小题1:How does the worker know the child is under 14?

A.By contacting with his parents.

B.By seeing if the child comes on his own.

C.By seeing if the child comes with his parents.

D.By looking at the child’s appearance and talking with him.小题2:What ISN’T the reason for setting up the new rule?

A.14 is the minimum age for babysitters.

B.Children like to play in Disney’s US parks with their parents.

C.Tourists think it’s necessary to have the age requirement.

D.A child on vacation with his parents died in a pool at Disney’s Pop Century Resort.小题3:What’s the main idea of this passage?

A.The happiest place for children.

B.A new rule of age requirement about children who go to Disneyland.

C.A survey of age requirement about children who go to Disneyland.

D.A child who fell into a pool and died at Disneyland.

选择题