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【简答题】
From Monday until Friday most people are busy working or studying, but in the evenings and on weekends they are free to relax (放松) and enjoy themselves. Some watch TV or go to the movies; others take part in sports. It depends on individual interests. There are many different ways to spend our spare time. Almost everyone has some kinds of hobbies. It may be anything from collecting stamps to making model airplanes. Some hobbies are very expensive, but others don’t cost anything at all. Some collections are worth a lot of money; others are valuable only to their owners. I know a man who has a coin collection worth several thousand dollars. A short time ago he bought a rare (稀有的) fifty-cent piece worth $250! He was very happy about his buying and thought the price was reasonable (合理的). On the other hand, my youngest brother collects matchboxes. He has almost 600 of them but I doubt (怀疑) if they are worth any money. However, to my brother they are very valuable. Nothing makes him happier than to find a new matchbox for his collection. That’s what a hobby means, I guess. It is something we like to do in our spare time simply for the fun of it. The value in dollars is not important, but the pleasure it gives us is. 小题1:The underlined word “individual” in the first paragraph most probably means____ . A.different B.strange C.secret D.one's own 小题2:In the writer's opinion, ____. A.all hobbies are very expensive B.some hobbies don't cost anything C.hobbies are worthless D.hobbies are valuable to everybody 小题3:Something that one enjoys doing in one's spare time is a____ . A.job B.pleasure C.hobby D.habit
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【判断题】准确度的高低,常常以误差的大小来衡量。精密度的好坏常用偏差来表示。
A.
正确
B.
错误
【判断题】调节望远镜和载物台的台面时,平面镜可以任意放置。
A.
正确
B.
错误
【简答题】将500mg糖原样品用放射性氰化钾(K14CN)处理,被结合的14CN-正好是0.193μmol,另外500mg同一糖原样品,用含有3%的HCl的无水甲醇处理,使之形成还原末端的甲基葡萄糖苷。然后用高碘酸钾处理这个还原端成为甲基葡萄糖苷的糖原,新产生的甲酸准确值347μmol。计算(1)糖原的平均相对分子质量,(2)分支程度。
【单选题】已知score表如下图所示,若要“查询成绩在80~90之间的同学学号、课程号和相应成绩”,SQL语句不正确的是( )
A.
SELECT studentNo, courseNo, score FROM Score WHERE score>=80 AND score<=90< p="">
B.
SELECT studentNo, courseNo, score FROM Score WHERE score BETWEEN 80 AND 90
C.
SELECT studentNo, courseNo, score FROM Score WHERE (score NOT BETWEEN 0 AND 80) AND (score NOT BETWEEN 90 AND 100)
D.
SELECT studentNo, courseNo, score FROM Score WHERE score IN (SELECT score FROM Score WHERE score>=80 AND score<=90)< p="">
【判断题】调节望远镜和载物台的台面时,平面镜可以任意放置。
A.
正确
B.
错误
【单选题】聚乙烯塑料是含有( )两种元素的高分子化合物。
A.
碳,氢
B.
氯,氢
C.
碳,氯
D.
碳,氮
【判断题】调节望远镜和载物台的台面时,平面镜可以任意放置。
A.
正确
B.
错误
【判断题】你认为会计职业好就业吗?
A.
正确
B.
错误
【判断题】当客户所寄物品的包装为钢瓶或棕色瓶,则表明内装物品极有可能是危险品。
A.
正确
B.
错误
【判断题】准确度的高低常以误差大小来衡量,精密度的大小常用偏差来衡量。 ( )
A.
正确
B.
错误
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