将一个等腰梯形绕着它的较长的底边所在的直线旋转一周，所得的几_爱下问搜题

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问题选择题

将一个等腰梯形绕着它的较长的底边所在的直线旋转一周，所得的几何体包括（　　）

A．一个圆台、两个圆锥

B．两个圆台、一个圆柱

C．两个圆台、一个圆柱

D．一个圆柱、两个圆锥

答案

等腰梯形较长的边可能是下底也可能是腰

当较长的边是下底时，等腰梯形线旋转一周所得的几何体包括，一个圆柱、两个圆锥

当较长的边是腰时，等腰梯形线旋转一周所得的几何体包括，一个圆锥，一个圆台再挖掉一个圆锥

故选：D

完形填空

I can never wipe off the memory that I met my current stepmom for the first time.After I parted with my father for ages, I moved to America and was      with him. In the beginning, she made sure to let me know that I was welcome in her    .I remember when I first saw her at the    . It was different, but not    . Over the past years there is       I needed that she did not provide. I’m the young woman I’m today because she made sure to       me properly.Yesterday I went to see her for Mother’s Day. When I gave her    , she held my face in both of her hands and kissed me straight on the mouth       I had the flu.
Her simple act of affection       me back to my first night in America. After I was       up from the airport we went home and she       my luggage and took me shopping for new clothes since the ones I had brought with me from Africa were a bit    .That night before I went to bed, she came to my room, the first room I had ever had for my own. She told me she was       to have me and that she would take good care of me. Before she       she asked me for a hug.That was my       first hug and I was 11 years old at that time.
I’m 23 years old now and I have received many       over the past years, but none has given me a greater       or deeper impression.I regarded her as my       mother because my new life began when I came to       with her. Today I say to my mother, Mrs. Sherrill Kirundi, thank you, mom. Thank you for your giving me my       childhood back.

B．railway station

C．unforgettable

D．uncomfortable

D．even though

单项选择题

甲午中日战争与抗日战争一败一胜的关键在于（）。

A.是否至始至终坚持抗战

B.是否取得了国际援助

C.政府与军队是否起了主要作用

D.是否实现了全民族抗战