太阳能制冷可以分为哪两大类?

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问题:

太阳能制冷可以分为哪两大类?

考点:能源概论常规能源、新能源常规能源、新能源题库
题型:问答题 简答题

One day Tony was crossing the road when he was hit a car. He fell and broke his arm.

He was sent to a hospital. There a doctor operated on his arm. Then he put the arm in a cast(石膏). Tony could not move it at all.

“You must keep your arm in a cast for a month.” The doctor said, “That will give the bone(骨头) a chance to get well”.

A moment later, Tony went back to the hospital. The doctor used a large knife to cut the cast. Then he took Tony’s arm out of the cast.

“Can you move your arm, Tony?” he asked.

Tony tried to move his arm. At last it was difficult, but soon he could move it easily.

“Yes, it’s fine”. He said, “Thank you very much”

“In a few days it will be as good as before.” the doctor said, “Just exercise it a little every day.”

“Will I be able to play the guitar?” Tony asked.

The doctor smiled, “Of course, you will.” He said, “you will have no problems.”

“That’s good news.” Tony said, “Because I couldn’t play it at all before.

小题1:How did Tony break his arm?

A. He was hit by a car      B. He fell off a bike         C.A guitar fell on him

小题2:How long did he have to keep his arm in a cast?

A. One week             B. Four weeks              C.A few days

小题3:How was Tony’s arm when the doctor cut the cast?

A. It was OK            B. It was hurt                  C. It was worse.

小题4:What did the doctor tell him to do after the cast was taken off?

A. See another doctor     B. Play the guitar               C. Exercise his arm.

小题5:Why was Tony pleased?

A. The doctor gave him a guitar.

B. The doctor said he didn’t have to work again

C. He thought he could be able to play the guitar.

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数据:3,1,x,-1,-3的平均数是0,则这组数据的方差是(  )

A.1

B.2

C.3

D.4

题型:问答题 简答题

利用 Y 型管与其它仪器组合可以进行许多实验(固定装置略)。分析并回答下列问题:

(1)实验目的:验证SO2的氧化性。将胶头滴管中浓硫酸分别滴入 Y型管的两个支管中,所产生的两种气体相遇发生反应:SO2+2H2S=3S+2H2O,则在支管交叉处实验现象为                                                        ,硫化亚铁处加水的目的是                                                

(2)实验目的:探究 SO2与BaCl2反应生成沉淀的条件。SO2通入BaCl2溶液并不产生沉淀,再通入另一种气体后就产生了白色沉淀。常温下,若由右侧 Y型管产生另一种气体,则在其左右支管应放置的药品是                       ,导气管A的作用是                                                      

(3)实验目的:铁镁合金中铁含量的测定。①读取量气管中数据时,若发现水准管中的液面高于量气管中液面,应采取的措施是                                       ;②若称得铁镁合金的质量为 0.080g,量气管中初读数为1.00mL,末读数为 45.80mL(已折算为标准状况),则合金中铁的百分含量为              (精确到0.01%)。

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钢筋混凝土的力学性能主要是抗拉。( )

题型:问答题 简答题

应进行头颅B超检查()

A.胆红素脑病

B.新生儿缺氧缺血性脑病

C.新生儿溶血病

D.病理性黄疸

E.新生儿败血症

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