阅读理解
    Different weather makes people feel different．It influences health，intelligence and feelings．
    In August，it is very hot and wet in the south the US．People there have heart trouble and other kinds of health problems during this month．In the Northeast and the Middle West，it is very hot in the summer and very cold in the winter．People in these states have more heart trouble after the weather changes in February or March．
    The weather can also influence intelligence ． For example，in a 1983report by scientists，IQ(智商)of a group of students was very high when a very strong wind came, but after the strong wind,
    Their IQ was 10% lower than before. The wind can help people have higher intelligence. However,very hot weather can make it lower. Students in many schools of the US often get worse in exams(考试)in the hot months of the year(July and August).
    Weather also has a strong influence on people's feelings．Winter may be a bad time for thin people．They usually feel cold during these months．They might feel unhappy during cold weather．But fat people may have a hard time in hot summer．At about 18℃people become stronger．Low air pressure may make people forgetful．People leave more bags on buses and in shops on low-pressure days．
    Are you feeling sad，tired，forgetful，or unhappy today？It may be the weather's problem．

大作文，同学们，下面有三个题目：①My best friend②My school in the future③My favourite painting你喜欢哪个题目?请选择你喜欢的一个题目，并把题目抄写在标题的横线上，然后在试着写一篇作文，60个单词左右。

分别向氢氧化钠溶液和澄清石灰水中通入CO₂，发生的反应可用下列化学方程式表示：

2NaOH+CO₂═Na₂CO₃+H₂O；Ca（OH）₂+CO₂═CaCO₃↓+H₂O

一个数的倍数是有限的，而它的因数却是无限的。

改革开放以来，我国的就业制度发生了一系列变化，鼓励人们可以通过人才市场____。持证上岗、____、公开招聘等新鲜事物层出不穷。