题目

下列实验现象描述正确的是（ ）A. 硫在空气中燃烧产生蓝紫色火焰B. 红磷在空气中燃烧产生大量白烟C. 木炭燃烧后生成黑色固体D. 蜡烛在氧气中燃烧生成水和二氧化碳 答案：【答案】B【解析】硫在氧气中中燃烧产生蓝紫色火焰，红磷在空气中燃烧，产生大量的白烟，木炭燃烧，生成能使澄清石灰水变浑浊的气体。A、硫在空气中燃烧产生淡蓝色火焰，故A不正确；B、红磷在空气中燃烧，产生大量的白烟，故B正确；C、木炭燃烧，生成能使澄清石灰水变浑浊的气体，故C不正确    “Time is a problem for children,” states a news report for a new Swiss watch. Children in some countries “learn time slowly” because “they don’t wear watches” and “parents don’t really know how to teach them time.” The children grow up with this handicap and become adults-and then can’t get to work on time. Is there an answer to this problem? Of course-it’s the Flick Flak, made by a famous Swiss watch company.     The Flick Flak is being marketed as something teaching watch for children aged 4 to 10. The watch itself does not teach children how to tell time, of course; it merely “takes their imagination” by presenting the “hour” hand as a beautiful red girl named Flak and the “minute” hand as a tall blue boy named Flick. Flick points to related “blue” minutes on the dial, while Flak points to “red” hour numbers. The characters and colors combined with parental help, are supposed to teach young children how to tell time.     The watch comes equipped with a standard battery and a nylon band (尼龙表带). Peter Lipkin, the United States sales manager for the Flick Flak, calls it “childproof: if it gets dirty you can throw the whole watch in the washing machine.” The product is being sold in select department stores in Europe, Asia and the United States for a suggested price of $25. Parents who buy the watch may discover that it is one thing to tell time; it’s quite another for them to be on time. 60. From the news report we know that ______.    A. parents are patient when teaching children time      B. parents have little idea of how to teach children time    C. children are likely to learn time quickly        D. children enjoy wearing the Flick Flak watch 61. The author doesn’t seem to believe ______.    A. children will be on time if they have not learnt how to tell time    B. a Flick Flak can help parents teach their children how to tell time    C. the Flick Flak can take children’s imagination    D. children usually have trouble telling time if they don’t wear watches 62. The underlined word handicap (Para. 1) means ______.    A. displeasure     B. discouragement     C. disappointment    D. disadvantage 63. The United State sales manager calls the new watch “childproof” because ______.    A. it is designed to teach children to be on time     B .it proves to be effective in teaching children time    C. it is made so as not to be easily damaged by children       D. it is the children’s favorite watch