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【单选题】
Passage One There are people in Italy who can’t stand soccer. Not all Canadians love hockey. A similar situation exists in America, where there are those individuals you may be one of them who yawn or even frown when somebody mentions baseball. Baseball to them means boring hours watching grown men in funny tight outfits standing around in a field staring away while very little of anything happens. They tell you it’s a game better suited to the 19th century, slow, quiet, and gentlemanly. These are the same people you may be one of them who love football because there’s the sport that glorifies “the hit”. By contrast, baseball seems abstract, cool, silent, still. On TV the game is fractured into a dozen perspectives, replays, close-ups. The geometry of the game, however, is essential to understanding it. You will contemplate the game from one point as a painter does his subject; you may, of course, project yourself into the game. It is in this projection that the game affords so much space and time for involvement. The TV won’t do it for you. Take, for example, the third baseman. You sit behind the third base dugout and you watch him watching home plate. His legs are apart, knees flexed. His arms hang loose. He does a lot of this. The skeptic still cannot think of any other sports so still, so passive. But watch what happens every time the pitcher throws: the third baseman goes up on his toes, flexes his arms or brings the glove to a point in front of him, takes a step right or left, backward or forward, perhaps he glances across the field to check his first baseman’s position. Suppose the pitch is a ball. “Nothing happened,” you say. “I could have had my eyes closed.” The skeptic and the innocent must play the game. And this involvement in the stands is no more intellectual than listening to music is. Watch the third baseman. Smooth the dirt in front of you with one foot; smooth the pocket in your glove; watch the eyes of the batter, the speed of the bat, the sound of horsehide on wood. If football is a symphony of movement and theatre, baseball is chamber music, a spacious interlocking of notes, chorus and responses.
A.
4 .By stating “I could have had my eyes closed.” the author means (4th paragraph last sentence) . A ) the third baseman would rather sleep than play the game
B.
B ) even if the third baseman closed his eyes a moment ago, it could make no difference to the result
C.
C ) the third baseman is so good at baseball that he could finish the game with eyes closed all the time and do his work well
D.
D ) the consequence was so bad that he could not bear to see it
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【单选题】有线电话的信道包括( )。
A.
无线电波、基站等
B.
电话线和中继器、交换机等传输设备
C.
双绞线、集线器、路由器、光纤等
D.
基站、双绞线、光纤等
【单选题】断路器的绝缘水平是由__决定的。
A.
额定电流
B.
额定电压
C.
额定动稳定电流
D.
最高工作电压
【判断题】常见的有线信道包括明线、双绞线、同轴电缆和光纤等。
A.
正确
B.
错误
【多选题】有线信道包括以下哪些?
A.
明线
B.
对称电缆
C.
同轴电缆
D.
光缆
【多选题】有线信道包括以下哪些?
A.
闭路线缆
B.
同轴电缆
C.
光纤
D.
光缆
【简答题】常见的有线信道包括 、 、 。
【多选题】有线信道包括______________。
A.
架空明线
B.
光纤
C.
网线
D.
双绞线
【判断题】通信信道分为有线信道和无线信道,其中有线信道主要包括双绞线网线、同轴电缆和光纤
A.
正确
B.
错误
【判断题】通信通道只包括有线通道而不包括无线通道
A.
正确
B.
错误
【多选题】狭义信道仅指传输媒介,是发送设备和接受设备之间的可以用于传输信号的媒介,可以分为有线信道和无线信道,其中无线信道包括
A.
架空明线
B.
对称线缆
C.
短波
D.
地面微波接力
E.
卫星通信
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