目前，制造计算机所用的电子元器件是( )。
A) 大规模集成电路
B) 晶体管
C) 集成电路
D) 电子管
参考答案：A
解析： 根据计算机所采用的主要物理器件，将计算机的发展划分成4个阶段：第一代(1946～1957年)电子管时代：第二代(1958～ 1964年)晶体管时代：第三代(1965～1970年)中、小规模集成电路时代；第四代(1971年至今)大规模和超大规模集成电路时代。
| Cloze test. | ||||
| People think children should play sports. Sports are fun, and playing with others. However, playing sports can have 1 effects on children. It may produce feelings of poor self-respect or aggressive behavior in some children. According to research on kids and sports, 40,000,000 kids play sports in the US. Of these, 18,000,000 say they have been 2 at or called names while playing sports. This leaves many children with a bad 3 of sports. They think sports are just too aggressive. Many researchers believe adults, especially parents and coaches, are the main 4 of too much aggression ill children's sports. They believe children 5 aggressive adult behavior. This behavior is then further strengthened through both positive and negative feedback. Parents and coaches are powerful teachers because children usually look up to them. Often these adults behave aggressively themselves, sending children the message that 6 is everything. Many parents go to children's sporting events and shout 7 at other players or cheer when their child behaves 8 . As well, children arc even taught that hurting other players is 9 or are pushed to continue playing even when they are injured 10 , the media makes violence seem exciting. Children watch adult sports games and see violent behavior replayed over and over on television. As a society, we really need to 11 this problem and do something about it. Parents and coaches 12 should act as better examples for children. They also need to teach children better 13 . They should not just cheer when children win or act aggressively. They should teach children to 14 , themselves whether they win or not. Besides, children should not be allowed to continue to play when they are injured. If adults allow children to play when injured, this gives the message that 15 is not as important as winning. | ||||
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