更多"The electronic computer is chiefly "的相关试题:
[单项选择]The electronic computer is chiefly characterized by its accurate and rapid computation.（）
A. 电子计算机的主要特性是计算准确和计算迅速。
B. 电子计算机的主要特点是计算准确而迅速。
C. 电子计算机是准确而迅速的。
D. 电子计算机被准确和迅速定为其首要个性。
[单项选择]With the introduction of the electronic computer, there is no complicated problem can be solved in a few hours.
A. but
B. which
C. that
D. what
[单项选择]The speed with which an electronic computer works depends on its（）
A. electronic circuits
B. programmer
C. vacuum tubes, or transistors
D. instructions
[单项选择]The electronic computer is ______some of the tasks that were once accomplished by our own brains.
A. taking care
B. taking in
C. taking off
D. taking over
[单项选择]Apple hopes to increase Mackintosh sales chiefly by ______.
A. making its new models capable of running IBM software
B. improving the color graphics of its new models
C. copying the marketing strategies of IBM
D. giving the customers what they want
[单项选择]Computer data bases and electronic mail systems have been around since the late 1970s.（）
A. 计算机数据库和电子邮件自20世纪70年代末，便无处不在了。
B. 20世纪70年代后期以来，计算机数据库和电子邮件系统已被广泛使用。
C. 20世纪70年代末，计算机数据基础和电子邮递系统就已经在大家周围了。
D. 在20世纪70年代后期，计算机数据库和电子邮件已普及了。
[单项选择]Computer date base and electronic mail systems have been around since the late 1970s.（）
A. 计算技术数据库和电子邮件自20世纪70年代末，便无处不在了。
B. 20世纪70年代后期以来，计算机数据库和电子邮件系统已广泛使用。
C. 到20世纪70年代，计算机数据基础和电子邮件系统就已经存在了。
D. 在20世纪70年代后期，计算机数据库和电子邮件已经普及了。
[单项选择]
Heroin addictions today is found chiefly among young men of minority groups in ghetto(犹太人区)areas. Of the more than 60,000 known addicts, more than half live in New York State. Most of them live in New York City. Recent figures show that more than half of the addicts are under 30 years of age.
Narcotic addiction in the United States is not limited to heroin users. Some middle-aged and older people who take narcotic drugs regularly to relieve pain can also become addicted. So do some people who can get drugs easily, such as doctors, nurses, and pharmacists. Studies show that this type of addict has personality and emotional problems very similar to those of other regular narcotic users.
Many addicts admit that getting a continued supply is the main object of their lives. An addict’ s concentration on getting drugs often prevents continuing an education or working at a job. His health is often poor. He may be sick one day from the effects of withdrawal and sick
A. How to cure a drug addict.
B. Heroin and narcotic.
C. The harm of the drugs and the anti drug measures taken by the government.
D. The American laws.
[单项选择]Farming in Middle West is favorable chiefly because ______.
[单项选择]The passage is chiefly about ______.
A. an effort to protect an endangered marine species
B. the civilian use of a military detection system
C. the exposure of a U.S. Navy top-secret weapon
D. a new way to look into the behavior of blue whales
[单项选择]Credit cards are chiefly used to ______.
A. pay rent
B. pay telephone bills
C. buy things
D. pay the seller
[单项选择]
Both bus and tree topologies are characterized by the use of multipoint(1)．For the bus,all stations attach,through appropriate hardware(2) known as a tap,directly to a linear transmission medium, or bus. Full-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the(3).Atransmission from any station propagates the length of the medium in both directions and can be received by all other(4).At each end ofthe bus is a(5),which absorbs any signal, removing it from the bus．
空白（4）处应选择（）
A. routers
B. stations
C. servers
D. switches
