题目

It is only during the last few years that man has generally realized that in the world of nature a balance exists between all forms of life. No living thing can exist by itself: it is a part of a system (体系) in which all forms of life are joined together. If we change one part of the natural order, this will in its turn almost certainly bring about changes in some other part. The cutting down of forests reduces the supply of oxygen. The killing of weeds and insects by chemicals leads to the wide spread poisoning of animals and birds. The throwing of waste products into the ocean harm to li下面是几种实验室制取气体的发生装置和收集装置．（1）写出图中标示仪器的名称：①______，②______．（2）上述装置中的A和C组合后，可以用来制取并收集的气体是______，写出实验室制取该气体的化学方程式：______ 2H2O+O2↑