【名词&注释】
氧化铁(iron oxide)、硝酸铵(ammonium nitrate)、氢氧化钠(sodium hydroxide)、碳酸氢钠(sodium bicarbonate)、氯化钠(sodium chloride)、摩擦阻力(frictional resistance)、稀硫酸(dilute sulfuric acid)、稀盐酸(dilute hydrochloric acid)、硫酸铜溶液(copper sulfate solution)、质量比(mass ratio)
[单选题]下列说法中错误的是
A. 踢球时，摩擦阻力使地上滚动的球越来越慢
B. 投球时，手的推力使篮球在空中继续飞行
C. 顶球时，头顶球的力改变了球的运动方向
D. 接球时，手对球的力使球由运动变为静止
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举一反三：
[单选题]29． Which of the following is WRONG?
A. People can- t live without food．
B. There is no need for children to have a good breakfast． ．
C. Children without breakfast may not study as well as children with breakfast in the morning．
D. Breakfast is as important as the．other two meals of the day．
[单选题]在盛有水的烧杯中加入以下某种物质，形成溶液过程中，温度下降。这种物质可能是（ ）
A. 氯化钠
B. 硝酸铵
C. 氢氧化钠
D. 蔗糖
[单选题]下列各组物质充分反应后，溶液质量比(mass ratio)反应前的溶液质量减小的是【】
A. 铁片浸入稀硫酸(dilute sulfuric acid)中
B. 铁片浸入硫酸铜溶液(copper sulfate solution)中
C. 氧化铁粉末加入稀盐酸(dilute hydrochloric acid)中
D. 碳酸氢钠粉末加入稀盐酸(dilute hydrochloric acid)中
[单选题]AWeather has a great influence(影响) on people．It influences people's health, intelligence (智力) and feelings．
A. People there have heart disease and other kinds of health problems during this month． In the Northeast and Middle West, it is very hot at some times and very cold at other times．People in these places may have heart disease after the weather changes in February or March．
B. For example, in a 1982 study by scientists, the in scores of a group of students were very high during a storm, but after the storm their IQ scores were lower than usual level． So storms can increase intelligence．However, very hot weather can lower it． Students in the United States often do badly on exams in the hot months of the year．
C. Winter may be a bad time for thin people．They usually feel cold during these months and they may feel unhappy during cold weather． In hot summer weather, on the other hand, fat people may feel unhappy． The sum- mer heat may make them tired and they are easy to get angry．
D. lf thin people feel unhappy, the weather may be very _________．
E. warm
F. cold
G. cool
H. hot
[单选题]对物质进行分类，是研究物质的基本方法。在下面的四种化合物中，与另外三种不属于同一类别的物质是（ ）
B. CuSO4
D. FeSO4
E. H
F. Cl
G. Na2
H. CO3
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