刺激引起兴奋的基本条件是使跨膜电位达到A．锋电位B．阀电位C．负后电位D．局部电位E

餐饮业大约起源于人类文明的（）期。

世界上最长的人工河流是（　　）

A．黄河

B．海河

C．淮河

D．京杭运河

阅读理解。

     Every baby born a decade from now will have its genetic code (基因编码) mapped at birth, the head of

the worlds' leading genome sequencing (基因图谱) company has predicted.

     A complete DNA read-out for every newborn will be technically possible and affordable in less than five

years, promising a revolution in healthcare, says Jay Flatley, the chief executive of Illumina. Only social and

legal problems are likely to delay the age of "genome sequences," or genetic profiles. By 2019 it will have

become routine to map infants' genes when they are born, Dr Flatley told The Times.

     This will open a new approach to medicine, by which conditions such as high blood pressure and heart

disease can be predicted and prevented and drugs used more safely and effectively.

     A baby's genome can be discovered at birth by a blood test. By examining a person's genome, it is possible

to identify raised risks of developing diseases such as cancers. Those at high risk can then be screened more

regularly, or given drugs or dietary advice to lower their chances of becoming ill.

     Personal genomes could also be used to ensure that patients get the medicine that is most likely to work

for them and least likely to have side-effects.

     The development, however, will raise legal concerns about privacy and access to individuals' genetic

records.

     "Bad things can be done with the genome. It could predict something about someone-and you could

possibly hand the information to their employer or their insurance company," said Dr Flatley.

     "People have to recognize that this horse is out of the barn, and that your genome probably can't be

protected, because everywhere you go you leave your genome behind. Complete genetic privacy, however,

is unlikely to be possible", he added.

     As the benefits become clearer, however, he believes that most people will want their genomes read and

interpreted. The risk is nothing compared with the gain.

1. In the first two paragraphs, the author mainly wants to tell us about _____. [ ]

A. the significant progress in medicine

B. the promise of a leading company

C. the information of babies' genes

D. the research of medical scientists

2. Which of the following is a problem caused by this approach? [ ]

A. The delaying in discovering DNA. 

B. The risk of developing diseases at birth.

C. The side-effects of medicine on patients.

D. The letting out of personal genetic information.

3. What does the underlined sentence "... this horse is out of the barn" mean? [ ]

A. Genetic mapping technique has been widely used. 

B. Genetic mapping technique is too horrible to control.

C. People are eager to improve genetic mapping technique.

D. People can't stop genetic mapping technique advancing.

4. What's Dr Flatley's attitude towards the technology? [ ]

A. Tolerant.

B. Conservative.

C. Positive.

D. Doubtful.

安居乐业：颠沛流离( )

A．吸收：放弃
B．简单：杂乱
C．雪中送炭：雪上加霜
D．巧夺天工：鬼斧神工

数据库设计的四个阶段是：需求分析、概念设计、逻辑设计和( )。

A．编码设计

B．测试阶段

C．运行阶段

D．物理设计