发动机主电门放到OFF位时，则（）A.低压和高压燃油关断活门关； B.高压燃油关断活

关于设备的自然寿命，下列说法正确的是（）。

A．自然寿命是指设备从开始使用直到由于有形磨损等原因造成不能继续使用为止所经历的全部时间

B．寿命主要是由设备的无形磨损决定的

C．搞好设备的维修和保养可延长设备的物理寿命

D．设备的自然寿命不能成为设备更新的估算依据

E．自然寿命主要是由设备的有形磨损决定的

某社区口腔健康调查资料显示，牙周疾病患病状况不容乐观，牙防所计划开展如下口腔保健措施。

对全社区的各类人群计划开展（）。

A.计划爱牙周活动

B.口腔健康教育与促进

C.黑板报展览

D.政治思想教育

E.计划爱牙月活动

All day long he flew, and at night-time he arrived at the city. “Where shall I put up?” he said; “I hope the town has made preparations.”

Then he saw the statue(雕像) on the tall column.

“I will put up there, ” he cried; “it is a fine position, with plenty of fresh air.” So he flew down and settled just between the feet of the Happy Prince.

“I have a golden bedroom,” he said softly to himself as he looked around, and he prepared to go to sleep; but just as he was putting his head under his wing, a large drop of water fell on him.

“What a curious thing!” he cried; “there is not a single cloud in the sky, the stars are quite clear and bright, and yet it is raining. The climate in the north of Europe is really terrible. ”

Then another drop fell.

“What is the use of a statue if it cannot keep the rain off?” he said; “I must look for a good chimney-pot,” and he determined to fly away.

But before he had opened his wings, a third drop fell, and he looked up, and saw –AH! What did he see?

The eyes of the Happy Prince were filled with tears, and tears were running down his golden cheeks. His face was so beautiful in the moonlight that the little Swallow was filled with pity.

“Who are you? ” he said.

“ I am the Happy Prince. ”

“ Why are you weeping(哭泣) then?” asked the Swallow; “you have quite wetted me.”

“When I was alive and had a human heart, ” answered the statue, “I did not know what tears were, for I lived in Palace of Sans-Souci(无忧宫)，where sorrow is not allowed to enter. In the daytime I played with my companions in the garden, and in the evening I led the dance in the Great Hall. Round the garden ran a very high wall, but I never cared to ask what lay beyond it, everything about me was so beautiful. People called me the Happy Prince, and happy indeed I was, if pleasure be happiness. So I lived, and so I died. And now that I am dead they have set me up here so high that I can see all the ugliness and all the misery of my city, and though my heart is made of lead(铅), yet I can’t choose but weep.”

“ What! Is he not solid gold? ” said the Swallow himself. He was too polite to make any personal remarks out loud.

1. The Swallow wanted to put up when he arrived at the city because_______.

A. he saw the Statue of the Happy Prince.

B. he flew into a lovely golden bedroom.

C. he had a whole-day flight and wanted to sleep.

D. it was night and a rain was likely to come soon.

2. Why did the Swallow feel curious when a drop of water fell on him?

A. Because of the heavy rain though there was no cloud in the sky.

B. Because the statue couldn’t keep the rain off though made of gold.

C. Because he thought it was raining despite bright and clear stars.

D. Because he couldn’t understand why the Happy Prince was weeping.

3. Which of the following is TRUE according to the passage?

A. Seeing the Prince’s beautiful face, the Swallow had pity on him.

B. The Swallow flew away immediately he found it was raining.

C. The Prince lived happily because he didn’t know what tears were.

D. The Swallow had wanted to find a good chimney-pot but failed.

3. What made the Happy Prince weep according to the passage?

A. The high wall stopping him from going out.

B. His not being able to play with his companions.

C. His sudden death and his statue being too high.

D. The hard life of the people and his inability to help.

分析筛分试验结果，如果原煤中含粗粒级的量较多，且灰分较低，说明煤质（）；否则，认为煤质（）。

过去我们一直强调农村的公共事业由农民、农村集体组织自己办，国家的公共服务没有向农村倾斜。因此，城乡之间公共事业发展的差距非常大，突出的问题，一是基础设施缺乏，二是教育、文化、卫生等社会事业发展明显滞后。近几年来，国家在农村实施“六小”工程，2004年投入280多亿元，其中包括一部分道路建设资金，农村基础设施的面貌确实有了一定程度的改善。国家在农村教育和卫生方面的投入在不断增加，但是差距还是非常大。 这段文字主要是强调( )。

A．农村公共事业发展差距大

B．“六小”工程改善了农村基础设施

C．国家投入重点应放在农村社会事业发展上

D．农村公共事业仍需要国家加大投入