在双侧电源系统中，当两电压电势模值相同且系统阻抗角和线路阻抗角相等时，振荡中心处于（

在分布式数据库系统中，数据分布透明性是方便用户使用数据的重要保证。数据分布透明性的最高级别是（）透明性。

下列食物中，不经消化即可被吸收的是[     ]

A．麦芽糖

B．脂肪

C．氨基酸

D．淀粉

Few students would dream of getting a job as a shoe shiner working along the street. College students, in their own eyes and in the eyes of the public, are expected to get at least a proper job, if not working in a high-income or white-collar position.

Cai Yong’s decision to work as a shoe shiner shocked not only his parents, who had high hopes for him, but also his girlfriend.

“It is right for young graduates to be ambitious (有抱负的). But they have to start in a solid

and down-to-earth way,” Cai said. Cai is not alone in making such a choice. The company has got

12 college students in all.

“I come for the 800 yuan monthly pay,” said Xiao Ji, who is a student from Nanjing University. “I have grown up and no longer live on my parents,” he said.

“Working as shoe shiners can mean a bright future,” Cai said.

Not everyone can accept this job choice. Cai’s girlfriend left him because she felt ashamed to be with a shoe shiner, and Cai accepted the fact. “This is the price to be paid for a job,” he said.

A former shoe shiner, Zhong Haibo, from a medical college, believes it was a good training for the rest of his life. “There is nothing I can’t do after working as a shoe shiner,” Zhong said, meaning that such kind of experience in early life is helpful in a future job.

39. Cai Yong decided to work as          .

A. a college teacher  B. a company manager  C. a shoe shiner   D. a medicine maker

40. Why did Cai’s girlfriend leave him?  

A. They didn’t get along well with each other.   B. Her parents didn’t like him.

C. She found it a shame to marry a shoe shiner.  D. Cai had got a new girlfriend.

41. Most people think Cai’s choice          .

A. unbelievable     B. nice                 C. enjoyable      D. wonderful

42. From the passage we know Zhong Haibo          .

A. doesn’t like college life                           B. thinks highly of working as shoe shiners

C. is a middle school student                        D. is still a shoe shiner at the moment

青少年比儿童，更容易接受父母的离婚，但更难适应父母的（）。

据2003年2月3日某报载：近年来，我国股票市场的增长速度较快，相比之下债券市场却遭到了冷遇。中国的企业债券市场从20世80年代中期兴起，从发行市场看，自1987年至1998年的12年间，企业债券累计发行约1360 亿元，与1997年全年企业通过发行股票筹集资金大体相当。1997年当年发行的企业债券为股票筹资额的22.6%，同国际上其他国家相比，这个规模显然偏小。从二级市场情况看，债市与股市的差距就更为明显。1995年底，在上海和深圳证券交易所上市的企业债券达到20家，以后就再也没超过这一数字。由于交易品种稀少，交易量也微乎其微。

从以上资料可以看出，在（）年时，发行的企业债券为股票筹资额的22.6%。

A．1996

B．1997

C．1998

D．1999