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【单选题】
Economists group commercial banks, savings and loan associations, credit unions, mutual funds, mutual savings banks, insurance companies, pension funds, and finance companies together under the heading financial intermediaries. Financial intermediariesA.
provide a channel for linking those who want to save with those who want to invest .
B.
produce nothing of value and are therefore a drain on society's resources.
C.
can hurt the performance of the economy.
D.
hold very little of the average American's wealth.
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【简答题】A ( ) contains circuitry that converts the data-carrying signals from a digital device to signals that can travel over various communications channels
【多选题】活动式地毯铺设一般适用于下列()种情况：
A.
装饰性的工艺地毯一般采用活动式铺设，因为大部分装饰性地毯属于工艺地毯，主要是起装饰作用。
B.
方块地毯一般是不加任何固定的，平放在基层上即可。
C.
在人活动不是很频繁的部位，采用活动式铺设。
D.
有其他附带固定办法时。
【单选题】Of the following, which is NOT the way TV signals travel?
A.
In a curve.
B.
In a straight line.
C.
In all directions.
D.
Toward the horizon.
【单选题】What happens to signals as they travel the length of the medium?
A.
They decode.
B.
They amplify.
C.
They attenuate.
D.
They implode.
【简答题】放大器的静态工作点过高可能引起 失真,过低则可能引起 失真。分压式偏置电路具有自动稳定 的优点。
【单选题】A 56Kbps Modem is a device that translates the ( ) signals from your computer into analog signals that can travel over a standard phone line, and it can sends data at 56,000 bits per second.
A.
analog
B.
voice
C.
digital
D.
mouse
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