
【名词&注释】
混合物(mixture)、根本原因(basic reason)、煤气中毒(gas poisoning)、蒸馏水(distilled water)、加热空气、物理变化(physical change)、避暑胜地(summer resort)、硝酸银溶液(silver nitrate solution)
[单选题]生活处处有化学。下列变化过程只有物理变化(physical change)的是
A. 葡萄酿酒
B. 食品发霉
C. 水分蒸发
D. 煤气中毒
查看答案&解析
举一反三:
[单选题]名称中有“水”字的物质可能是溶液,下列有“水”字的物质属于溶液的是
A. 硬水
B. 油水
C. 泥水
D. 蒸馏水
[单选题]– Hello, May I speak to Mike?-- _____. Please call back later?
A. Wait a moment
B. Hold on
C. Speaking
D. Sorry , he is out
[单选题]28. Which is NOT true?
A. Now in Germany,the teleshopping is more developed than that last year.
B. The French spend a lot of money to buy things by teleshopping,
C. Some big companies in Sweden are selling things by teleshopping
D. Americans are the first to buy things through teleshopping.
[单选题]53.
A. take care
B. looked after
C. take care of
D. looks after
[多选题]②将铁粉和铜粉的混合物放入硝酸银溶液(silver nitrate solution)中,反应结束后,对剩余固体成分的判断正确的是______。
A. 肯定有银
B. 肯定有铜
C. 可能有铁
D. 可能是铁和银
[单选题]阅读⑥⑦段,选出对两段内容理解不恰当的一项( )(3分)
A. 春天从来不到高山驻足,春天到达海边的时间较晚,这是高山和海滨成为避暑胜地(summer resort)的根本原因。
B. 热空气上升,高空高太阳又近,所以气温应该随地势升高而增高。这种认识是错误的。
C. 太阳的能量不是直接加热空气,而是先把地面烤热,所以空气温度的高低,取决于距离地面的高度。
D. 春天迟到海边的原因是有两个:一是海水温度变化较慢;二是海风吹来吹去,影响气温。
[单选题]22. Jay Chou-s mother sent him to learn the piano ________ .
A. in 1982
B. when he was in primary school
C. when he was five
D. when he was in high school
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