问题 问答题 简答题

大修后第一次起动机组的注意事项有哪些?   

答案

参考答案:

(1)、应手动起动机组;(2)、若超过机组的空载第一开度,机组不动应查明原因再操作;(3)、机组起动时应注意倾听有无异常声音、撞击、异常振动等,否则视其情况处理或紧急停机;(4)、机组起动后应严密监视各轴承温度、油槽油面、冷却水压等,尤其是轴承温度升得过快时要作好停机的准备,并进行检查;(5)、水轮机密封装置应专人监视。

阅读理解

Haikou: A shark was killed after being dragged to shore at Yalong Berth beach in Sanya, South China’s Hainan Province, on Sunday afternoon.

It was the first time a shark had been caught in the beach area, a popular tourist site in Hainan.

Local fishermen said they caught the 3-meter-long, l-ton shark by chance When they were fishing in sea water 1,000 metres deep near the beach.

Police temporarily(暂时)protected the shark while oceanographers decided whether it was a species belonging to State protection.

Fishermen later killed and sold the shark after oceanographers confirmed that it was a whale shark and therefore not under State protection.

The shark was believed to have drifted into the area from the deep sea due to strong waves caused last week by Typhoon Imbudo. It had no open injuries but experts said they believed it suffered from internal(内部的)bleeding.

Local police officer Fu Chenggeng said beachgoers should not feel threatened by sharks because the fish never attack human beings on their own initiative. Fu said he had never heard of any shark attacks at the Sanya beach since he first started work there eight years ago.

However, police said they will improve the security system to safeguard tourists’ safety on the beach.

1.A possible title of the article should be      .

A.Tourists in Danger              B.Killing Whale Shark

C.Shark Caught in Beach Area      D.Whale Shark in Danger

2.From the article it can be learned      .

A.the shark was caught because of obvious injuries 

B.the number of the whale shark may be small

C.typhoon Imbudo may have brought the shark to the area

D.it’s not unusual to see a shark on the beach

3.The underlined word “confirmed” probably means      .

A.said      B.believed       C.thought        D.made sure

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