通常情况下，在气温0℃时的室内，水所处的状态是（ ）

根据材料内容，选择正确答案。

Dear Frank,    

    Thank you for your postcard. I'm very glad you are having a good trip now. Ottawa is very beautiful in May. I hope I will have a chance to go there one day.

    Our summer holidays will start next month. I enjoy my summer holidays, although(虽然)it's hot at that time in America. During summer holidays，I can swim in the sea and go fishing. It's so cool. And I am going to our hometown near Chicago with my sister Linda，and my parents agree(同意). Our uncle lives  there，so Linda and I can stay with him.

    We are not going to take a plane. We are going there by train. I am going to fish there. And Linda likes painting. She is going to do some painting there. I'm sure we'll have a good time.

                                                            Sincerely,

                                                              Jack

修改病句。

①打乒乓对我十分感兴趣。

②这本故事书的内容和插图都很美丽。

③站在讲台上，我的心热烈地跳动着。

④我怎么也忘不了发生在过去的往事。

⑤我们必须学习那种顽强拼搏。

生物圈的范围包括____ 的底部、____ 的大部和____ 的表面。

如图所示，小林同学以塑料为连接轴将两个玩具电机的转轴连接起来，开关S闭合后，灯泡发亮，请说明甲、乙两个电机分别相当于什么装置，其中甲电机的工作原理是什么，乙电机的原理与动圈式话筒和扬声器中的那个相同？