题目

HAVE you noticed that the moon is becoming rounder and brighter day after day? That’s because Sept 8 is the Mid-Autumn Festival.     For Chinese people, a full moon means that family members can get together on that day. On the Mid-Autumn Festival, people get together and enjoy the round moon . They also send wishes for family members not with them.    There are many stories about the moon to make the tradition more interesting. In China, Chang’e flying to the moon is a well-known legend(传说). Hou Yi and Chang’e were husband and wife in old times. At the time, there were 化学实验室有一盖玻璃片的集气瓶，正放在桌面上，不知盛有何种气体？请你作出一种假说（猜想），并按你的假设填表，完成探究过程。假设（猜想） 验证方法及操作 可能看到的现象 结论