介导移植排斥反应的主要细胞是（）。 A.B细胞 B.巨噬细胞 C.T细胞 D.树突状

阅读理解。

    My name is Betty Sanders. I'm a telephoneoperator(话员), and work for a company. My jobis very interesting. I love it very much. I work fivedays a week, and my hours are from 9 o'clock to 5o'clock. I do a lot of things--I place long-distance(长途) calls for people; I answer questions, and Ihelp people when they are in trouble.    

    Today, for example, I had an interesting experience(经历). At 11 o'clock this morning, I got a call from a man. I didn't know who he was. He was in trouble and I could tell that hewas worried about something. He gave me an address and asked me to send an ambulance(救护车)right away. I asked him if somebody was hurt, but he didn't answer my question. He told me he needed a doctor at once, so I said I'd call an ambulance for him but I still wanted toknow what was wrong. Then he said, "Our keys are gone!" I didn't understand that! Whywould he need an ambulance just because he couldn't find his keys? Then I found out what the trouble was. The man and his wife left thecar keys on a coffee table and later theycouldn't find them. Their little boy Johnny wasplaying in the room, and they thought he hadswallowed them.      

    But before I could help him, he told me hewouldn't need an ambulance any more. His wifefound the keys in her bag. They were there allthe time.

1. Betty Sanders works________. 

A. in a factory              

B. in a shop

C. in a company            

D. in a hospital

2. She works ________.

A. forty hours a week

B. from 9 am to 4 pm

C. from Monday to Saturday

D. seven days a week

3. The man called Betty because  

A. he thought Betty was a doctor

B. he had lost his keys

C. he wanted to ask for an ambulance

D. his son was ill

4. In fact,  his keys ________.'

A. were swallowed by his little son

B. were on a coffee table

C. were left in the car

D. were put in his wife's bag

5. From the passage we can see _________.

A. Betty Sanders likes her work

B. Betty's job is to place long-distance calls  for people

C. the man' s little boy likes playing with  keys

D. doctors can help people find keys

( )可以发布通缉令。

A．县级以上检察机关

B．县级以上人大常委会

C．县级以上公安机关

D．县级以上人民政府

标识X线的放射方式称为 （）

A.自激辐射

B.特征辐射

C.自发辐射

D.轫致辐射

E.热辐射

铜蓝蛋白的主要功用是（）

A.运输铁

B.运输铜

C.能与细胞外血红蛋白结合

D.丝氨酸蛋白酶的抑制剂

E.运输胆红素

发现前方机动车停车排队缓慢行驶时，属于交通陋习的是什么行为？

A．加塞抢行

B．不强行超车

C．停车或依次行驶

D．不占用非机动车道行驶