题目列表(包括答案和解析)
7. _______ her stamps _______ groups in her spare time is her great pleasure.
6. Our great achievements _______ what we did in the past and do today.
5. It is said that the invention of his will ______ the people living in this area.
4. He _______ the tourists and took them back to the coach.
3. Our school ______ two main parts, the senior part and the junior one.
2. Nothing can ______ from what you have today now.
用所给词或短语的适当形式填空。
|
be
made up of take away benefit round up depend on classify...into... promote born make an attempt be based on |
1. The price______ the quality.
26.小明将一张矩形纸片沿对角线剪开,得到两张全等直角三角形纸片(如图2),量得他们的斜边长为10cm,较小锐角为30°,再将这两张三角纸片摆成如图3的形状,使点B、F、D在同一条直线上,F为公共直角顶点。然后小明又将图(3)中的△ABF沿直线AF翻折到图(4)的位置,点B落在FD边上的B1点,AB1交DE于点H。
请你说明:(1)AH=DH.;(2)点H在∠AFD的角平分线上。
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25.如图,在△ABC中, D、E分别是AC、AB上的点, BD与CE交于点O. 给出下列三个条件:①∠EBO=∠DCO;②∠BEO=∠CDO;③BE=CD.
(1)上述三个条件中, 哪两个条件可判定△ABC是等腰三角形(用序号写出所有情形);
(2)选择第⑴小题中的一种情形, 证明△ABC是等腰三角形.
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24.
如图,在
中,
是
上一点,
交
于点
,
,
,
与
有什么位置关系?证明你的结论.
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