会计核算的人民币为[ ] A．本位币 B．本币 C．货币 D．记账本位币

阅读理解。

     What will people die of 100 years from now? If you think that is a simple question, you have not been

paying attention to the revolution that is taking place in bio-technology (生物技术). With the help of new medicine, the human body will last a very long time. Death will come mainly from accidents, murder and

war. Today's leading killers, such as heart diseases, cancer, and aging itself, will become distant memory.

     In discussion of technological changes, the Internet gets most of the attention these days. But the

change in medicine can be the real technological event of our times. How long can humans live? Human

brains were known to decide the final death. Cells(细胞) are the basic units of all living things, and

until recently, scientists were sure that the life of cells could not go much beyond 120 years because the

basic materials of cells, such as those of brain cells, would not last forever. But the upper limits will be

broken by new medicine. Sometime between 2050 and 2100, medicine will have advanced to the point

at which every 10 years or so, people will be able to take medicine to repair their organs(器官). The

medicine, made up of the basic building materials of life, will build new brain cells, heart cells, and so

on-in much the same way our bodies make new skin cells to take the place of old ones.

      It is exciting to imagine that the advance in technology may be changing the most basic conditional

human existence, but many technical problems still must be cleared up on the way to this wonderful future.

1. According to the passage, human death is now mainly caused by _______.

A. diseases and aging                

B. accidents and war

C. accidents and aging              

D. heart diseases and war

2. In the author's opinion, today's most important advance in technology lies in _____.

A. medicine      

B. the internet    

C. brain cells    

D. human organs

3. Humans may live longer in the future because ______.

A. heart disease will be far away from us

B. human brains can decide the final death

C. the basic materials of cells will last forever

D. human organs can be repaired by new medicine

4. We can learn from the passage that _____.

A. human life will not last more than 120 years in the future

B. human have to take medicine to build new skin cells now

C. much needs to be done before humans can have a longer life

D. we have already solved the technical problems in building new cells.

下述实验不能到达预期目的的是

Of all the employed workers in the United States, 12.5 million are part of a temporary workforce. The United States Bureau of Labor Statistics counts 9.2 percent of workers as those who have______(1) they term "alternative employment arrangements." The government predicts that temporary staffing agencies______(2) experience growth of 49 percent by 2010. If numbers increase at the rate ______ (3), these companies will add 1.9 million new jobs by 2010. That’’s more than any______(4) industry.Temporary workers were the first ones to be affected by the recent economic recession, but they are______(5) to be the first to regain positions as the economy picks up and companies work to rebuild. Employers use temporary workers as a resource because_______(6) offer flexibility and come at a low cost. Many temporaries are categorized as "independent contractors" instead of employees,______(7) allows the employer to avoid______(8) certain taxes. Because they are not required to offer benefits to temporary workers, companies can save a great deal of money by hiring temps. Usually, temporary workers can qualify_______(9) benefits if they work for a staffing company for a certain length of time. Most temps, however, do not continue with one company long______(10) to qualify for them because they regard the position as a step on the ladder to a______(11) position later.According to Richard Wahlquist, president of the American Staffing Association, 75_______(12) of temporary workers hope for transition out of the temporary staffing category______(13) a period of time. Wahlquist finds that temporary workers spend about 11 weeks on various assignments before their______(14) out of the temporary workforce. Many use temporary positions to gain experience and skills______(15) they move on to better jobs. Wahlquist says that the temp workforce as a whole turns______(16) 400 percent each year.Tom Dilworth, research director at the Employment Policies Institute, explains______(17) some workers like having temporary jobs______(18) it affords them a great deal of elasticity with time and everything. Some temps only have a limited______(19) of time to work and temp agencies can help coordinate jobs to fit their schedules. Other sometimes-employees use temporary jobs to get an______(20) to a company from the inside, to get a foot in the door of a certain business or career._______(21) others take temporary positions in hopes their employers will change them over to permanent positions eventually.Nearly all the industries in the United States use temporary workers.______(22) to Tim Costello, coordinator of the North American Alliance for Fair Employment, the growth of temporary labor threatens______(23) job security of permanent workers who fear replacement, as well as the temps who are more accustomed to turnover. He predicts that there will continue to______(24) a gradual shift from permanent employees to contingent staffing, and that such a_____(25) in workplace demographics will "lead to lower wages, poorer working conditions, and more instability."

滋养细胞肿瘤

A．AFP
B．CA125
C．ACTH
D．E₂
E．HCG

警察的发展呈现出一定的阶段性，一般分为( )。

A．萌芽期的警察
B．古代警察
C．近代警察
D．现代警察