如图1，把正方体沿上下底面的正方形对角线竖直方向切掉一半后得到图2，把切面作为正面观察，设它的主视图、左视图的面积分别为S₁、S₂，则S₁：S₂=（　　）

一个电动机线圈的电阻是5Ω，当它接在220V的电压下正常工作时，通过的电流是0.6A，求：

下列有关古代埃及的叙述，正确的有 (      )

①埃及大部分领土位于非洲东部

②埃及气候干旱，终年雨量稀少

③尼罗河是埃及唯一的水源

④尼罗河谷地区一度成为当时世界上最富裕的地区之一

⑤约从公元前3000年开始，尼罗河沿岸陆续出现了几十个小国

根据短文理解，判断正误。

    The summer vacation is over. It's true that time always flies fast. During the vacation, the weather was hot and I could not do much work, but I lived happily.

As the afternoon was hot, I did my work in the morning. I used to get up at 6:30 and take a walk in the garden for half an hour. After breakfast, I began reading English and Chinese and did some exercises in math. Those took me three hours or more. I worked quite hard and made good progress.

    I spent the afternoon outside. I went to swim and it was funny. I would not go home until it was about five or six o'clock. Sometimes a friend of mine would come to see me and we would spend some hours listening to music.

    In this way I spent my vacation happily. And I not only studied well but also became a good swimmer. Now I am in good health and high spirits.