1/5单选题
难度：
1.
如图，M是Rt△ABC的斜边BC上异于B、C的一定点，过M点作直线截△ABC，使截得的三角形与△ABC相似，这样的直线共有（ ）
| A | 1条 |
| B | 2条 |
| C | 3条 |
| D | 4条 |
- 提示1：
- PHA+6L+H54K5TeS9nOebtOe6v+S4juWPpuS4gOi+ueebuOS6pO+8jOS9v+aJgOW+l+eahOS4ieinkuW9ouS4juWOn+S4ieinkuW9ouacieS4gOS4quWFrOWFseinku+8jOWPquimgeWGjeS9nOS4gOS4quebtOinkuWwseWPr+S7pS48L3A+
正确答案：Qw==
PHA+6Kej77ya4oi15oiq5b6X55qE5LiJ6KeS5b2i5LiO4pazQUJD55u45Ly877yMPGJyPuKItOi/h+eCuU3kvZxBQueahOWegue6v++8jOaIluS9nEFD55qE5Z6C57q/77yM5oiW5L2cQkPnmoTlnoLnur/vvIzmiYDlvpfkuInop5LlvaLmu6HotrPpopjmhI88YnI+4oi06L+H54K5TeS9nOebtOe6v2zlhbHmnInkuInmnaHvvIw8YnI+5pWF6YCJQy48L3A+
2/5单选题
难度：
2.
如图，平行四边形ABCD中，过点B的直线与对角线AC、边AD分别交于点E和F. 过点E作EG∥BC，交AB于G，则图中相似三角形有（ ）
| A | 4对 |
| B | 5对 |
| C | 6对 |
| D | 7对 |
- 提示1：
- PHA+5qC55o2u5bmz6KGM5Zub6L655b2i55qE5oCn6LSo5b6X5Ye6QUTiiKVCQ++8jEFC4oilQ0TvvIxBRD1CQ++8jEFCPUNE77yM4oigRD3iiKBBQkPvvIzmjqjlh7rilrNBQkPiiYzilrNDREHvvIzljbPlj6/mjqjlh7rilrNBQkPiiL3ilrNDREHvvIzmoLnmja4g55u45Ly85LiJ6KeS5b2i55qE5Yik5a6a5a6a55CG77ya5bmz6KGM5LqO5LiJ6KeS5b2i5LiA6L6555qE55u057q/5oiq5YW25a6D5Lik6L655oiW5YW25a6D5Lik6L6555qE5bu26ZW/57q/77yM5omA5oiq55qE5LiJ6KeS5b2i5LiO5Y6f5LiJ6KeS5b2i55u45Ly85Y2z5Y+v5o6o5Ye65YW25a6D5ZCE5a+55LiJ6KeS5b2i55u45Ly8LjwvcD4=
正确答案：Qg==
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
3/5单选题
难度：
3.
如图，AD∥BC，∠D=90°，AD=2，BC=5，DC=8. 若在边DC上有点P，使△PAD与△PBC相似，则这样的点P有（ ）
| A | 1个 |
| B | 2个 |
| C | 3个 |
| D | 4个 |
- 提示1：
- PHA+5qC55o2u5bey55+l5YiG5Lik56eN5oOF5Ya14pazUEFE4oi94pazUEJD5oiW4pazUEFE4oi94pazQ0JQ5p2l6L+b6KGM5YiG5p6Q77yM5rGC5b6XUETnmoTplb/vvIzku47ogIznoa7lrppQ5a2Y5Zyo55qE5Liq5pWwLjwvcD4=
正确答案：Qw==
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
4/5单选题
难度：
4.
如图，每个小正方形边长均为1，则下列图中的三角形（阴影部分）与左图中△ABC相似的是（ ）
| A |
|
| B |
|
| C |
|
| D |
|
- 提示1：
- PHA+5pys6aKY5Li76KaB5bqU55So5Lik5LiJ6KeS5b2i55u45Ly85Yik5a6a5a6a55CG77yM5LiJ6L655a+55bqU5oiQ5q+U5L6L77yM5YiG5Yir5a+55ZCE6YCJ6aG56L+b6KGM5YiG5p6Q5Y2z5Y+v5b6X5Ye6562U5qGILjwvcD4=
正确答案：Qg==
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
5/5单选题
难度：
5.
如图，P为线段AB上一点，AD与BC交于E，∠CPD=∠A=∠B，BC交PD于F，AD交PC于G，则图中相似三角形有（ ）
| A | 1对 |
| B | 2对 |
| C | 3对 |
| D | 4对 |
- 提示1：
- PHA+5YWI5qC55o2u5p2h5Lu26K+B5piO4pazUENG4oi94pazQkNQOy48L3A+
- 提示2：
- PHA+5Yip55So55u45Ly85LiJ6KeS5b2i55qE5oCn6LSo77ya5a+55bqU6KeS55u4562J77yM5YaN6K+B5piO4pazQVBE4oi94pazUEdEPC9wPg==
- 提示3：
- PHA+6L+b6ICM6K+B5piO4pazQVBH4oi94pazQkZQ5YaN6K+B5piO5pe25rOo5oSP5Zu+5b2i5Lit6ZqQ5ZCr55qE55u4562J55qE6KeSPC9wPg==
正确答案：Qw==
PHA+6Kej77ya4oi14oigQ1BEPeKIoELvvIziiKBDPeKIoEPvvIw8YnI+4oi04pazUENG4oi94pazQkNQLjxicj7iiLXiiKBDUEQ94oigQe+8jOKIoEQ94oigRO+8jDxicj7iiLTilrNBUETiiL3ilrNQR0QuPGJyPuKIteKIoENQRD3iiKBBPeKIoELvvIziiKBBUEc94oigQiviiKBD77yM4oigQkZQPeKIoENQRCviiKBDPGJyPuKItOKIoEFQRz3iiKBCRlDvvIw8YnI+4oi04pazQVBH4oi94pazQkZQLjxicj7mlYXpgIlDLjwvcD4=