[单项选择]Each Cell of Asynchronous Transfer Mode (ATM) has fix length. How long is it
A. 50B
B. 51B
C. 52B
D. 53B

[判断题]ATM称为异步转移模式，（Asynchronous Transfer Mode）是一种快速分组交换的传输方式。

[单项选择]This ATM has been out of service for a few days. It should （） last week.
A. fix
B. be fixed
C. have fixed
D. have been fixed

[单项选择]An individual nerve cell usually has a large cell body and a __________ nucleus.
A. cohesive
B. immature
C. conscientious
D. conspicuous

[单项选择]Each Web （） has its own unique address known as a URL(Uniform Resource Locator).
A. server
B. point
C. computer
D. site

[单项选择]ATM网络中传输的分组称为信元(Cell)，ATM信元及信头的字节数分别为( )
A. 5，53
B. 53，5
C. 48，5
D. 5，48

[单项选择]Which of the following transportation mode has the most flexibility（）
A. highway
B. railway
C. aircraft
D. railway

[单项选择]

Each scientific specialty has its own set of journals. Physicists have Physical Review Letters, cell biologists have Cell, neuroscientists have Neuron, and so forth. Science and Nature, (1) , are the only two major journals that (2) the complete range of scientific (3) . As a result, journalists look (4) them each week for the (5) of new science papers. And scientists look to the journals (6) to reach journalists. Why do they care Competition for (7) has gotten so fierce that scientists have sought popular (8) to gain an advantage over their (9) . Publication in specialized journals will win the honor of academics and satisfy the publish-or-perish (10) , but Science and Nature come with the added bonus of potentially getting your paper written up in The New York Times and other publications.
Scientists are also trying to (11) other scientists through Science and Nature, not just the public. The l
A. documents
B. presentations
C. references
D. manuscripts