如图A所示，在一端开口的玻璃管中倒入一半水然后再注入一半的酒精，将管口密封后翻转让水和酒精充分混合，可以观察到混合液的体积 ____（选填“大于”、“小于”或“等于”）水和酒精的总体积，这一现象说明了 ____．如图B所示，分别在热水和冷水中滴入相同的红墨水，可以看到 ____水瓶中墨水扩散的快，这说明____跟温度有关．

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看图，阅读短文，判断正误。

    Tommy is a boy. He is short and thin. He is 10 this year.

    Sally is his sister. She is 11. They go to school together.

    Tommy often gets up(起床) at 6:30 in the morning. He likes sunny days, He doesn't like rainy days.

    Tommy loves his mum. When he leaves(离开) home, he always says "Goodbye!" to her.

一个圆柱的侧面展开图是一个正方形，则这个圆柱的底面直径与高的比是（  ）

连词成句。