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【简答题】
The word “sport” first meant somethin that people did in their free time. Later it often meant hunting (捕猎) wild animals and birds. About a hundred years ag o the word was first used for organized games. This is the usual meaning of the word today. People spend a lot of their spare time playing football, basketball, tennis and many other sports. Such people play because they want to. A few people are paid for the sport they play. These people are called professional sportsmen. They may be sportsmen for only a few years, but during that time the best one can earn a lot of money. For example, a professional footballer in England earns more than $3000 a year. The starts earn a lot more. International golf and tennis champions (网球锦标赛) can make more than $50000 in a year. Of course, only a few sporsmen can earn as much money as that. It is only possible in sports for individuals (个人的) like golf, tennis and motor-racing. Perhaps the most surprising thing about sportsmen and money is that: the star can earn more money from advertising than from sport. An advertising for sports equipment (设备) does not simply say “Buy our thing”. It says “Buy the same shirt and shoes as…”. Famous sportsmen can even advertise things like watches and food. They allow the companies to use their name or a photo of them and they are paid for this. Sport is no longer just something for people’s spare time. 根据上文内容判断正(T)误(F) 小题1:A “professional” sportsman is someone who likes sports very much. 小题2: The word “sport” now usually means “organized ” games. 小题3: An advertisement for sports equipment just says “Buy our thing”. 小题4:The sport stars can earn as much money from advertising as from sport. 小题5:This passage mainly talks about sport and money.
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【单选题】下列属于在混凝土拌制过程中掺入、用以改善混凝土性能的,掺量一般不超过水泥质量的5%的物质是()。
A.
增强材料
B.
减水剂
C.
早强剂
D.
外加剂
【判断题】DES算法的加密和解密使用相同的算法,只是将子密钥的使用次序反过来。
A.
正确
B.
错误
【单选题】以下各项不属于描述色谱峰宽的术语
A.
标准差
B.
半峰宽
C.
峰宽
D.
容量因子
【判断题】混凝土外加剂是指在拌制混凝土过程中掺入的,用以改善混凝土性能的物质。一般情况掺量不超过水泥质量的5%。
A.
正确
B.
错误
【单选题】混凝土外加剂是在拌制混凝士过程中掺入、用以改善混凝土性能的物质,掺量一般不大于水泥质量的()%。
A.
1.5
B.
2.5
C.
5
D.
10
【单选题】以下 ( )不 属于描述色谱峰宽的术语。
A.
标准偏差
B.
半峰宽
C.
峰宽
D.
保留因子
E.
基线宽度
【多选题】混凝土外加剂是什么()
A.
混凝土外加剂是一种在混凝土搅拌之前或拌制过程中加入的、用以改善新搅拌混凝土和(或)硬化混凝土性能的材料。
B.
在混凝土中掺入少量外加剂,可改善混凝土的性能,加速工程进度或节约水泥,满足混凝土在施工和事业中的一些特殊要求,保证工程顺利进行。
【单选题】以下( )不属于描述色谱峰宽的术语。
A.
标准差
B.
半峰宽
C.
峰宽
D.
容量因子
【判断题】混凝土外加剂是指在拌制混凝土过程中掺入的用以改善混凝土性能的物质,其掺量一般不大于水泥重量的 10% 。( )
A.
正确
B.
错误
【判断题】混凝土外加剂是指在拌制混凝土过程中掺入的用以改善混凝土性能的物质,其掺量一般不大于水泥重量的 5% (特殊情况除外)。
A.
正确
B.
错误
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