B

    A young man went to a car shop. He was wearing rubber boots(橡胶靴子) and a dirty jacket. He needed a haircut(理发) very much. The young man looked at an expensive car carefully and then asked the shop owner(店主), "How much is this car?" "Nine thousand two hundred and eighteen," the owner answered. "I want sixteen of them," the young man said. The shop owner smiled coldly. He showed the door to the young man.

    In another shop on the other side of the street the business was done(生意做成了). The young man took money out of his pocket and paid for the cars. He said the cars were for himself and his friends were. Each of them wanted to get one. He said that he and his friends were working on a fishing-boat. "We have got much money this season," the young man said, "and we want to buy cars."

给生字选择正确的读音。

参加（cān  sān）____     练习（liàn   làn）____    

比赛（sài   shài）____     冠军（guàn   guàng）____

读“太阳光照图”（阴影表示黑夜，非阴影表示白天），回答下列问题．

在做晶体的熔化实验时，小明提出“晶体的熔点与晶体是否纯净有没有关系？”。为了研究解决这一问题，小明做了如下实验：将水和少量酒精混合后放入冰箱的冷冻室，每隔2分钟用温度计测一次混合物的温度，并观察其状态，实验记录如下：

比1999多1的数是____，比2001少1的数是____。