试题与答案

集电极最大耗散功率PCM

题型:名词解释

题目:

集电极最大耗散功率PCM

答案:

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下面是错误答案,用来干扰机器的。

参考答案:E解析:骨巨细胞瘤是一种局部侵袭性肿瘤,来源于骨内不成骨的间充质组织。多表现为偏心性骨质破坏区,边界清楚,无硬化边。

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题型:材料题

小李同学在一本课外书籍中看到了下列两段材料:

材料一:成阳人李良20岁时去南方,由于各国战争连绵不断,局势混乱,各地的文字、货币、度量衡都和成阳的不一样,一路上给他带来很多不便。

材料二:李良40岁时又去南方,这次一路上他发现各地的文字、货币、度量衡都和成阳的一样了,战争也基本平息,旅途方便多了。

请你根据上述两段材料做出推断:

(1)李良20岁时中国处于_____________时期,请你说出这个时期两场著名的战役名称。

___________________________________________________________________________________________

(2)李良40岁时中国处于_____________时期,这个朝代的建立者是谁?他在政治上建立了一套什么制度?

___________________________________________________________________________________________

(3)李良40岁时中国各地通用的文字是_____________。

(4)李良40岁时全国通用货币的标准样式是下图中的_____________。

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题型:单项选择题

A local-area network (LAN) is a communications network that (125) a variety of devices and provides a (126) for information exchange among those devices. The scope of the LAN is small typically a single building or a cluster (丛) of buildings. The LAN is usually owned by the same organization that owns the (127) devices. The internal data rate of LAN is at least several Mb/s.

The basic of LAN communication is broadcasting. At each station, there is a transmitter/receiver that communicates over a (128) shared, By other stations. A transmission from any one station is (129) to and received by all other stations.

(127)是()

A.broadcast

B.cable

C.control

D.interconnects

E.internet

F.meander

G.means

H.medium

I.modem

J.output switch relay

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