[单项选择]The highly efficient modem communication system began ______.


A. over a century ago
B. in the middle 1960s
C. in the late 1980s
D. in the year 1980

[单项选择]The highly efficient modem communication system began ______.
A. over a century ago
B. in the middle 1960s
C. in the late 1980s
D. in the year 1980

[单项选择]The highly efficient modern communication system began ______.


A. over a century ago
B. in the middle 1960s
C. in the late 1980s
D. in the year 1980

[单项选择]

How efficient is our system of criminal trial Does it really do the basic job we ask of it—convicting the guilty and acquitting the innocent It is often said that the British trail system is more like a game than a serious attempt to do justice. The lawyers on each side are so engrossed in playing hard to win, challenging each other and the judge on technical points, that the object of finding out the truth is almost forgotten. All the effort is concentrated on the big day, on the dramatic cross examination of the key witnesses in front of the jury. Critics like to compare our "adversarial" system (resembling two adversaries engaged in a con test) with the continental "inquisitorial" system, under which the judge plays a more important inquiring role.
In early times, in the Middle Ages, the systems of trial across Europe were similar. At that time trial by "ordeal" —especially a religious event—was the main way of testing gu
A. the British legal system can do the basic job well—convicting the guilty and acquitting the innocent
B. the British legal system is worse than the continental legal system
C. the British legal system is often considered to be not very fair
D. the British legal system is very efficient

[单项选择]A highly organized system of irrigation is ______ Chinese agriculture.
A. typical of
B. consistent with
C. famous for
D. subject to

[单项选择]Modem technology has brought ______communication between people far apart.
A. competent
B. convenient
C. conscious
D. complete

[单项选择]A (72) is a data communication system that allows a number of independent devices to communications directly with each other in a limited geographic are
A. A． LANB. WANC. InternetD. Ethernet

[单项选择]What can an exhaust system do if it is efficient


A. It can prevent the waste gas from escaping.
B. It can let the waste gas and compound escape quickly out of it.
C. It can prevent the engine from producing waste gas.
D. It can store as much waste gas as possibl

[单项选择]When are airplanes not fuel efficient


A. On short trips.
B. On long trips.
C. When flying over cities.
D. When flying at high altitudes.

[单项选择]Within an informationally efficient securities market, new information results in profit-maximizing investors making price adjustments that are best described as:

[单项选择]家里拨号上网需要使用MODEM。下面关于MODEM的说法中错误的是______。
A. 调制器完成将模拟信号恢复成数字信号的功能
B. MODEM的调制方式主要有：振幅调制、频率调制和相位调制
C. MODEM主要分为外置式、内置式、插卡式和机架式
D. MODEM的传输模式主要有：传真模式、语音模式