题目

在宏观、微观、符号之间建立联系，是化学学科特有的思维方式。已知：氯化氢（HCl）是极易溶于水的无色气体，其水溶液俗称盐酸。 （1） 在充满HCl气体的试管中放入用石蕊试液浸泡成紫色并晾干的纸条，无明显现象；再滴入水，现象是。向盛有锌粉的试管中通入干燥的HCl气体，无明显现象；停止通气，再加入少量水，观察到有气泡产生，写出此时发生反应的化学方程式。 （2） 由（1）中现象可知，HCl气体和盐酸具有不同的化学性质，Rainforests are important places for people and animals．There are different kinds of rainforests．Some are high in the mountains and others are near the sea In the last forty years humans have destroyed half of the earth's rainforests．Rainforests are homes for about fifty million people．There are also millions of animals，plants and insects living there．When we destroy the rainforests，people lose their homes and thousands of kinds of animals and plants disappear Once these animals and plants have disappeared，we will never see them again．The weather in a rainforest is hot all year round The weather is always wet， too．The Amazon Rainforest is about a hundred million years old， and has more kinds of animals and plants than any other place on the earth．People have now cut down much of this rainforest to plant coffee and sugar．【1】Weather in rainforest is ______ ．A. neither hot nor wet B. both hot and wetC. hot and dry D. cold and wet【2】The underlined word 'disappear' in the passage means ______ ．A. leave B. cut downC. be seen no more D. lose【3】Which of the following about rainforest is true？ ______A. Rainforest are important to living thingsB. People have destroyed half of the earth's rainforest since 40years agoC. Rainforest are destroyed， people will lose homes， animals will never be seenD. All of above