用于金属之间的焊接方法有()。A.熔焊 B.压焊 C.钎焊 D.锡焊

题型:多项选择题

问题:

用于金属之间的焊接方法有()。

A.熔焊

B.压焊

C.钎焊

D.锡焊

考点:通信工程师通信电源设备使用维护通信电源设备使用维护题库
题型:多项选择题

美同科学家Willard S.Boyle与George E.Smith因电荷耦合器件(CCD)的重要发明荣获2009年度诺贝尔物理学奖,CCD是将光学量转变成电学量的传感器.下列器件可作为传感器的有(    )

A.发光二极管    B.热敏电阻

C.霍尔元件     D.于电池

题型:多项选择题

下列哪项是经咽鼓管途径至急性化脓性中耳炎()

A.在污水中游泳

B.不适当的咽鼓管吹张

C.不适当的擤鼻

D.鼻腔治疗不当

E.鼓膜穿孔

题型:多项选择题

A few months ago I was at a bus stop in town in the evening. The bus came on time and I took the window seat. The bus was travelling by the seashore and I was enjoying the soft wind while watching the sea waves (海浪). After a few minutes the bus made its next stop. A young boy and a girl got on. They were standing on my left when the bus pulled off. I looked at them in surprise and realized that all the window seats were taken up. They could sit but not together. Suddenly a different wave passed through my body and my inner mind gave me the advice to get up. I got up and offered them my seat. The young lady smiled kindly and said thanks. I took another seat and we parted our ways. I don’t remember whether I got off the bus before them or not.

Months passed by. Suddenly one day while I was standing at the same bus stop waiting some time for the bus to arrive I heard a voice.

“Excuse me, Uncle.” I looked in the direction of the voice. It was a beautiful young lady.

Puzzled, I said, “I do not recognize you.”

She said, “Do you remember you gave us your window seat?”

Puzzled, I said, “Maybe, but what is so great in that?”

She said, “If you had not given your seat that day, perhaps I would have not sat with my

friend. By sitting together it helped us bridge a misunderstanding that had been between us forever. Do you know we are getting married next month?”

“Good! God bless both of you,” I replied.

The young lady again said thank you and went on her journey. I realized the importance of giving that day.

小题1:Why were the young boy and the girl standing on the bus?

A.Because they couldn’t sit together.

B.Because they wanted to enjoy the sea weaves.

C.Because there were no empty seats.

D.Because they preferred to stand.小题2:The underlined sentence in the first paragraph probably means that the author had a feeling that ______.

A.the sea wave made him upset

B.he wanted to do something special

C.a wave from the sea passed by him

D.he wanted to make a sea wave in his heart小题3:The author’s act of kindness helped the young boy and the girl ______.

A.begin to talk to each other again after a time of silence

B.sit together and become friends very soon

C.know each other and get married

D.clear up a misunderstanding between them小题4: From the story, we can know that ______.

A.small things can create great happenings in life

B.giving is more important than receiving

C.offering one’s seat to others will lead to a marriage

D.we sometimes forget what happened in the past

题型:多项选择题

阻碍骨折愈合的治疗方法为()

A.反复多次手法复位

B.切开复位

C.持续骨牵引过度

D.固定不确定

E.功能锻炼

题型:多项选择题

当冷却水温度不高时,风扇离合器处于()状态,而当温度升高时,则处于()状态。

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