背斜是岩层变形后形成的（）的弯曲。A、向上拱起 B、向下凹陷 C、不变形 D、不规则

Read and choose. (阅读短文，选择正确答案)                                      

                                                      A Friendly American Family

     The Smiths are Americans. They are now in Beijing.  This is their first visit to China. They are going

to stay in China for two months. They want to visit some cities and villages(村庄). They hope to learn

some Chinese, too.

     Mr Smith is a doctor.  He will visit a hospital in Shanghai. Mrs Smith is a school teacher.  She is

going to some schools in cities and villages. Their daughter is a primary school student. She wants to

meet some Chinese students.

     They are going to take a lot of pictures in China.  When they are back in America, they will show

the pictures to their friends. They want the American people to know more about China.

1. Where are the Smiths from?              

A. Canada.            

B. America.            

C.  China.

2. What do they want to do in China?               

A. Teach English.    

B. Play games.          

C. Visit some cities and villages.

3. Where does Mrs Smith work?                      

A. In a restaurant.    

B. In a hospital.          

C. In a school.

4. Who wants to meet the Chinese students?              

A. Mr Smith's daughter.

B. Mr and Mrs Smith.

C. Mr Smith and her daughter.

5. What do they want to do when they are back home?              

A. Show the pictures of China to their friends.

B. Have a good rest.

C. Clean their house.

If you know the answer to the question，would you please______ your hand?    [ ]

A. put                

B. rise            

C. raise          

D. lift

下腔静脉受压并前移是由于：

A.胰头部肿瘤 

B.右肾静脉血栓形成 

C.肝尾叶的肿块 

D.右肾动脉瘤

RFID使用时标签的内容可以动态改变，反复使用。

个人所购外汇，可以汇出境外、存入本人（）账户，或者按照有关规定携带出境。

A.现钞账户

B.外汇结算账户

C.外汇储蓄账户

D.临时账户