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【单选题】
买了一幅美术作品原件,则他享有该美术作品的 (10) 。
A.
著作权
B.
所有权
C.
展览权
D.
所有权与其展览权
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【判断题】某厂商产量达到5万时的MR=65元,MC=55元,(其它条件一定)该厂商应继续扩大产量。
A.
正确
B.
错误
【单选题】Wind power is an ancient source of energy ________ we may return in the near future.
A.
on which
B.
by which
C.
to which
D.
from which
【单选题】&8226;Read this text taken from an article about using wind to generate power. &8226;Choose the best sentence from the opposite page to fill each of the gaps. &8226;For each gap 9-14, mark one letter ...
A.
Local residents are determined to fight this plan.
B.
They also dismiss claims that wind technology is inefficient.
C.
However, this development has not been universally welcomed.
D.
To achieve this, some 40,000 300-kilowatt turbines would be needed.
E.
In a press release they state that the countryside is always changing and they deny that wind machines look ugly.
F.
Recent research, however, has indicated some new problems.
G.
Such allegations are dismissed out of hand by the company.
H.
It is now regarded as an important and economically viable source of energy. (9)
【单选题】KM刀柄系统的锥度是()。
A.
03:20
B.
07:24
C.
01:10
D.
04:15
【判断题】位:是承载信息的最小单位,即二进制数的一位,也叫比特(bit)。
A.
正确
B.
错误
【判断题】以太网还采取一种叫作强化碰撞的措施。这就是当发送数据的站一旦发现发生了碰撞立即停止发送数据外,还要再继续发送32 bit或48 bit的人为干扰信号(Jamming Signal),以便让所有用户都知道现在已经发生了碰撞。对于10Mb/s以太网,发送32 bit或48 bit只需要3.3 或4.8 。
A.
正确
B.
错误
【单选题】下列()不属于CDMA系统提供的业务。
A.
传真业务
B.
120~960bit/s同步数据
C.
许可呼叫
D.
单次业务
【单选题】信息量的单位叫()。
A.
MA
B.
MHz
C.
KW
D.
Bit
【单选题】国家的就业政策有哪些?
A.
三支一扶
B.
西部志愿者
C.
选调生
D.
服兵役
【简答题】晶体鉴频器原理电路如下图所示,试分析该电路的鉴频原理并定性画出其鉴频特性。图中R 1 =R 2 ,C 1 =C 2 ,V 1 与V 2 特性相同。调频信号的中心频率f c 处于石英晶体串联谐振频率f s 和并联谐振频率f p 中间,在f c 频率上,C 0 与石英晶体的等效电感产生串联谐振,u 1 =u 2 ,故鉴频器输出电压u O =0。
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