要把外观一样的两杯水(一杯是浓盐水，一杯是清水)区分开(不能采用尝、摸等方法)，我们采用了以下的方法：

下列对生物膜系统功能的描述，哪项不正确                            （    ）

将下列句子组成语意连贯的一段话，语序排列最恰当的一项是（    ）

①名着是人类文化的精华，阅读它们，如同与大师们携手共游，可以增长见识，启迪智慧，提高语文能力和人文素养。

②不妨先读前言、后记和目录，以便对这本书的写作背景、作者情况、写作目的和大致内容有个初步的了解，犹如掌握了打开书的大门的钥匙。

③阅读名着以自读为主，并且掌握一些基本的阅读方法很有必要。

④最后要学会做点读书笔记，可以抄名言，写摘要，作批注，列提纲，制卡片，画图表，写心得等，养成“不动笔墨不读书“的好习惯。

⑤还要注意略读与精读相结合，略读全书有利于整体把握主要内容；精读精彩部分和难点部分有利于不断提高欣赏能力。

除哪一项外，其余都是毁林造田、大面积砍伐森林直接造成的严重后果（　　）

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．