衡量卫星接收系统性能的关键指标是品质因数G/T值。_爱下问搜题

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问题判断题

衡量卫星接收系统性能的关键指标是品质因数G/T值。

答案

参考答案：对

选择题

只用食盐、食醋、纯碱三种家庭厨房中的常见物质，你无法完成的实验是（　　）

A．检验自来水中是否含氯离子

B．鉴别食盐和纯碱

C．检验鸡蛋壳能否溶于酸

D．除去热水瓶中的水垢

完形填空

阅读下面短文，从短文后各题所给的四个选项A、B、C、D中，选出可以填入空白处的最佳选项.
Football is, I suppose, the most popular games in England. One had only to go to one of the important   31  to see this. One can see kinds of people there, shouting and   32  for one side or the other.
One of the most   33  thing about football in England to a stranger is the __34__ knowledge of the game which even the   35  seems to have. He can tell you the names of the players in   36  of the important teams. He   37  photos of them and knows the result of large numbers of matches. He will tell you   38  he expects will win such and such a match,
39 his opinion is usually as   40  as that of men three or four times his   41 .
Most schools in England take   42  seriously—much more seriously than nearly all the schools in other countries,   43 lessons are all important and games are left for one’s own arrangements（安排）. In England, it is believed that   44  is not only a matter of filling a boy’s mind with facts in the   45 ; it also means character training; and one of the   46 ways of training character is by means of games,   47 team games, where the boy has to learn to   48  with others for his team, instead of working just for himself alone. The school therefore arranges games and matches for its   49 . Football is a good team game and it is good exercise for   50 .

D．sports meet

D．disappointing

B．interesting

A．smallest boy

C．shortest child

D．most stupid child

D．physical education