若采用限制关键词出现的位置来提高检索相关度，我们可以选择关键词出现在（）、（）和（）

阅读理解。

    Back in 1994, I decided to learn Chinese-the most difficult thing I could think of to do. In 1996, my

company was going to set up a small factory in Qingdao and of course I volunteered to work there. Of

all the places to live and work in China, Qingdao is the best. I think.

    Qingdao is a popular tourist city for people to go for summer vacations. Its beaches can be crowded

during the summer months. There are plenty of places you can visit in Qingdao: the old Governor's

Mansion (总督官邸), Laoshan Mountain and Nanshan Market. The German Governor's Mansion was

built in the late 19th century. At that time, Qingdao was a German colony (殖民地).

    The German Governor's Mansion is a famous hotel now. Laoshan Mountain is a favorite tourist spot.

It is about an hour's drive from Qingdao. Nanshan Market is an open air market where you can find

almost anything you want. 

   The foods in Qingdao are famous. Seafood is the most popular dish. Another traditional dish is mutton

soup. For only one US dollar, you can get a big bowl of soup with a few pieces of mutton in it. 

   By the way, I met and married my Chinese wife while in Qingdao. I suppose I did okey with my

Chinese lessons.

1. The writer began to learn Chinese in 1994 because           . [ ]

A. he wanted to marry a Chinese girl

B. his company was going to set up a small factory in Qingdao

C. he wanted to work in China

D. Chinese is easy to learn for him

2. The best time to visit Qingdao is in ______. [ ]

A. spring

B. summer

C. autumn

D. winter

3. About the old governor's Mansion, which of the following statements is NOT right? [ ]

A. It is a building with the European style

B. It was built in the late 19th century

C. It once was the best building in Qingdao

D. It is a place of interest in Qingdao now

4. The writer thinks it is right for him to learn Chinese because           . [ ]

A. he was found a Chinese wife

B. he has a firm which belongs to him in Qingdao

C. he can eat seafood every day

D. he can buy everything he wants in Qingdao

5. Which is the best title for this passage? [ ]

A. A Beautiful City in China.

B. The History of Qingdao.

C. A Foreigher and His Chinese Wife.

D. A foreigher in Qingdao.

已知98％的浓硫酸的物质的量浓度为18.4mol／L，则49％的硫酸溶液的物质的量浓度为[ ]

A．9.2mol／L

B．大于9.2mol／L

C．小于9.2mol／L

D．不能确定

患者女性，58岁，因“颈肩部疼痛伴右上臂麻木”来诊。查体：患者颈肩部未见明显畸形，颈4～6棘突旁压痛（+），椎间孔挤压试验（±），臂丛神经牵拉试验：左（-），右（-），右上臂外侧感觉迟钝，右前臂、右手感觉正常。右肩肱二头肌肌腱处压痛阳性，垂臂试验阴性，右肩关节外展、后伸活动受限。

为鉴别该患者是颈椎病引起的疼痛，还是肩周炎引起的疼痛，需要进一步做的检查是（）

A.颈椎MRI

B.颈椎CT

C.肩关节MRI

D.肩关节CT

E.肱骨CT

F.肱骨MRI

行气管切开时，切口不宜低于第5气管软骨环，否则易

A．伤及气管后壁
B．引起喉狭窄
C．损伤食管
D．损伤无名动脉
E．以上都不是

能提供特殊功能或作用的子程序称（）。

A.变量

B.系统变量

C.函数

D.自定义函数