导致己内酰胺装置闪蒸罐进料温度与出料温度相差不大的原因是（）。A、蒸气压力低 B、闪

阅读理解。

     One day a poor farmer was taking a bag of rice  to town. Suddenly the bag fell from his horse on the

road. He didn’t know how to do about it because it was too heavy for him to lift by himself . He only

hoped that somebody would soon pass by and help him.

     Just at this moment a man riding a horse came up to him. But the farmer was very disappointed (失望) when he saw who he was. It was the great man living nearby. The farmer had hoped to ask another farmer or a poor manlike him.

     But to his surprise, the great man got off his horse as soon as he came nearer. He said to the farmer ," I see you need help, friend. How good it is that I’m here just at the right time.” Then he took one end of the bag, the farmer took the other, they together lifted and put it on the horse.

    "Sir," asked the farmer," How can I pay you ?"

    "It’s quite easy," the great man answered with a smile, "Wherever you see anyone else in trouble, do the same for him."

1.What happened when the farmer went to town?

A. His horse’s leg hurt

B. The bag fell from his horse

C. The farmer lost his bag  

D. The horse was ill

2. The farmer didn’t lift the bag onto the horse by himself  because ______.

A. the bag was broken    

B. the horse went away

C. the bag was too heavy for him to lift  

D. the farmer was very angry

3. Why was the farmer very disappointed when he saw the great man?  

Because he thought ______.

A. the great man couldn’t help him      

B . the great man could take away his bag

C. the great man could take away his horsed.

D. the great man couldn’t see him

4. Who helped the farmer ?

A. A great man    

B. Another farmer  

C. A poor man      

D. A friend

5. What does the story tell us ?

A. We should help the people in trouble.  

B. We should be friendly to each other

C. Each of us should be a kind man

D. A, B and C

下面列出的4种存储器中，易失性存储器是

A．RAM

B．ROM

C．FROM

D．CD-ROM

兆欧表不是专门用来测量大电阻的指示仪表。

发生在非正常妊娠期的卵巢囊肿是（）

A.囊腺瘤

B.良性畸胎瘤

C.黄素囊肿

D.黄体囊肿

E.以上都不是

燃烧器启动的前提是（）

1.通常关闭的空气压力监测器“LP”触头必须关闭，就是说端子4必须带有电压

2.空气挡板关闭，确定关闭（Closed）位置的限制开关“Z”必须将电压从端子11供给端子8

3.控制单元复位

4.烧料阀门（BV）关闭位置的检查，触头或端子12与具有类似检查功能的“LP”之间的其它触头必须是关闭的

5.燃料气压力监测器“GP”和限制热动开关或压力开关“W”的触头也必须是关闭的

A、①③④⑤

B、②③④⑤

C、①②③⑤

D、①②③④⑤