题目列表(包括答案和解析)

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7. –Maps are very useful ____ people who often travel, aren’t they?  -____.

  A. for; Yes, they are  B. for; No, they aren’t  C. to; Yes, they are

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6. –Do you know ____?  -In Harbin.

  A. where the Sun Island is  B. where is the Sun Island  C. where the Sun Island be

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5. –I hear that compass was first ____ by Chinese long before.  –You are right.

  A. useful  B. used  C. use

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4. –Is it easy to find the way ____ short distances?  -Yes, it is.

  A. of  B. to  C. over

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3. –I don’t know ____ to get there?  -Don’t worry, I will give you some ____.

  A. how, direction  B. when, method  C. how, directions

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2. -____ is it from your home?  -1,000 meters.

  A. How long  B. How far  C. How often

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1. -____ did you ____ to find the way?  -A compass and a map.

  A. What, use  B. What, used  C. Which, useful

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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,上一点,于点有什么位置关系?证明你的结论.

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