数据库表的字段可以定义默认值，默认值是（ ）。A． 逻辑表达式 B． 字符表达式

阅读理解。

     Jim Green has been in China for more than two years. He has been to many interesting places in

Beijing, but he has not yet been to many other parts of China. Last week he went to Mount Emei in

Sichuan Province with his family.

     Many people like to travel by air, but Jim's family think that travelling by train is the best. It is much

cheaper and far more enjoyable than a rushed trip by air.

     Early one moming, they took a taxi to Beijing West Railway Station. The station was very lively.

There were bookshops,food shops and stores selling all kinds of things. Mrs Green bought some fruit,

food and bottles of water to take on the train. She said that it was better toget some food before they

got on the train because food on the train was usually too expensive.

     The train was quite comfortable,and there weren't too many people in their sleeping car. The Greens

could stand up and walk around. It was a long journey, but none of them felt tired. They kept watching

the beautiful scenery out of the window. They walked, laughed and played cards. The conductor kept

coming to offer them hot water and selling them magazines. People nearby talked with each other. A

young man practiced speaking English with Mr Green. Jim thought the train was like a big moving party.

He went to sleep quite late. He listened to the click of the rails and then fell fast asleep.

     When Jim woke up the next morning, the train was already near Chengdu. His train ride seemed really

short, but his memory of the pleasant trip would last long.

1. How long has Jim been in China?

2. Where did Jim go to travel with his family?

3. Why does Jim's family like to travel by train?

4. What did Mrs Green buy before getting on the train?

5. Did the Greens feel tired on the train? Why or why not?

不属于艾炷灸的是（）

A.回旋灸

B.无瘢痕灸

C.隔蒜灸

D.瘢痕灸

E.雀啄灸

脑卒中患者采用诱发主动运动的阶段在（）。

A.急性期

B.亚急性期

C.软瘫期

D.痉挛期

E.改善期

会计关系是（）在办理会计事务过程中以及国家在管理会计工作过程中发生的经济关系。

A.会计师事务所和注册会计师

B.财政部门和被管理人员

C.审计机关和审计人员

D.会计机构和会计人员

同时针刺中府、孔最、足三里、三阴交四穴时,宜选用:( )

A． 伏卧位

B．仰卧位

C． 俯伏坐位

D． 侧伏坐位

E．侧卧位