标准状况下，112mL某气体的质量是0.17g，该气体可能是（ ） A．O2 B

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     A friend of mine named Jim received an expensive car from his brother as a Christmas present. On Christmas Eve

when Jim came out of his office,a street urchin(顽童) was walking around the shining car. "Is this your car, Jim?" he

asked.

     Jim answered,"Yes,my brother gave it to me for Christmas." The boy was surprised." You mean your brother gave

it to you and it didn't cost you nothing? Boy, I wish..." He hesitated(犹豫).

     Of course Jim knew what he was going to wish for. He was going to wish he had a brother like that. But what the

boy said surprised Jim greatly.

     "I wish," the boy went on," that I could be a brother like that." Jim looked at the boy in surprise, then he said

again, "Would you like to take a ride in my car?"

     "Oh yes,I'd love that."

     After a short ride, the boy turned and with his eyes shining, said, "Jim, would you mind driving in front of my

house?"

     Jim smiled a little. He thought he knew what the boy wanted. He wanted to show his neighbours(邻居) that he

could ride home in a big car. But Jim was wrong again. "Will you stop where those two steps are?" the boy asked. 

     He ran up to the steps. Then in a short while Jim heard him coming back, but he was not coming fast. He was

carrying his little crippled(残疾) brother. He sat him down on the step and pointed to the car.

     "There she is, Buddy, just like I told you upstairs. His brother gave it to him for Christmas and it didn't cost him

a cent. And some day I'm going to give you one just like it...

1. The street urchin was very surprised when __________.

A. Jim received an expensive car

B. Jim told him about the car

C. he saw the shining car

D. he was walking around the car

2. From the story we can see the urchin __________.

A. wished to give his brother a car

B. wanted Jim's brother to give him a car

C. wished he could have a brother like Jim's

D. wished Jim could be a brother like that

3. The urchin asked Jim to stop his car in front of his house __________.

A. to show his neighbours the big car

B. to show he had a rich friend

C. to let his brother ride in the car

D. to tell his brother about his wish

4. We can infer(推断) from the story that __________.

A. Jim couldn't understand the urchin

B. the urchin had a deep love for his brother

C. the urchin wished to have a rich brother

D. the urchin's wish came true in the end

5. The best name of the name story is __________.

A. A Christmas Present

B. A Street Urchin

C. A Brother Like That

D. An Unforgettable Holiday Ride

（）是指人体较长时间接触带电体而不致发生触电危险的电压。

A.安全电压

B.跨步电压

C.接触电压

D.击穿电压

某市检察分院的反贪局侦查员李某，在办理自侦案件的过程中，认为本案中存在专门性问题，需要由本检察院的技术部门进行鉴定。下列什么人员或机构有权决定进行该项鉴定

A．侦查员李某

B．市检察分院反贪局领导

C．市检察分院检察长

D．市检察分院检察委员会

遮断信号机距防护地点不得少于（）。

A、50米

B、100米

C、150米

D、200米

长期观测钻孔一般应沿地下水的流向，并垂直于（）或（）布置。需测制较大范围的水位等值线时，可布置（）。若区内有自然或人工排泄点时，应以排泄点为中心布置观测线，至少应布置两条互相垂直的观测线。