1/5单选题
难度：
1.
如图，在△ABC中，∠B=90°，AB=8cm，BC=6cm，点P从点A开始沿AB向B以2cm/s的速度移动，点Q从点B开始沿BC向C点以1cm/s的速度移动，如果P，Q分别从A，B同时出发，当△PBQ的面积为最大时，运动时间t为( )s.
| A | 2 |
| B | 3 |
| C | 4 |
| D | 5 |
- 提示1：
- PHA+55So5ZCrdOeahOS7o+aVsOW8j+ihqOekuuWHulBC44CBUULlho3moLnmja7kuInop5LlvaLnmoTpnaLnp6/lhazlvI/orqHnrpcuPC9wPg==
正确答案：QQ==
PHA+6Kej77ya5qC55o2u6aKY5oSP5b6X5LiJ6KeS5b2i6Z2i56ev5Li677yaPGJyPjxpbWcgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC83RC82Mi9yQkFDRTFQVjd2eXluMGNzQUFBQkhDb2FmS2s1MzIucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzdELzYyL3JCQUNFMVBWN3Z5eW4wY3NBQUFCSENvYWZLazUzMi5wbmciIGhlaWdodD0iNDIiIHdpZHRoPSI2Ij7vvIg4LTJ077yJdD0tdDxzdXA+Mjwvc3VwPis0dD0t77yIdC0y77yJPHN1cD4yPC9zdXA+KzTvvIw8YnI+4oi1Le+8iHQtMu+8iTxzdXA+Mjwvc3VwPuKJpTA8YnI+4oi05b2TdD0y5pe277yM4pazUEJR55qE6Z2i56ev5pyA5aSn5Li6NGNtPHN1cD4yPC9zdXA+LjwvcD4=
2/5单选题
难度：
2.
如图，在△ABC中，∠B=90°，AB=8cm，BC=6cm，点P从点A开始沿AB向B以2cm/s的速度移动，点Q从点B开始沿BC向C点以1cm/s的速度移动，如果P，Q分别从A，B同时出发，当△PBQ的面积为最大时，运动时间t为( )s.
| A | 2 |
| B | 3 |
| C | 4 |
| D | 5 |
- 提示1：
- PHA+55So5ZCrdOeahOS7o+aVsOW8j+ihqOekuuWHulBC44CBUULlho3moLnmja7kuInop5LlvaLnmoTpnaLnp6/lhazlvI/orqHnrpcuPC9wPg==
正确答案：QQ==
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
3/5单选题
难度：
3.
如图，△ABC中，∠C=90，AB=10cm，AC=8cm，点P从点A开始出发向点C以2cm/s的速度移动，点Q从B点出发向点C以1cm/s的速度移动，若P、Q分别同时从A，B出发，（ ）秒后四边形APQB是△ABC面积的
| A | 2 |
| B | 4.5 |
| C | 8 |
| D | 7 |
- 提示1：
- PHA+55Sx5LqO5Zub6L655b2iQVBRQuaYr+S4gOS4quS4jeinhOWImeeahOWbvuW9ou+8jOS4jeWuueaYk+ihqOekuuWug+eahOmdouenr++8jOinguWvn+WbvuW9ou+8jOWPr+efpVM8c3ViPuWbm+i+ueW9okFQUUI8L3N1Yj49UzxzdWI+4pazQUJDPC9zdWI+LVM8c3ViPuKWs1BDUTwvc3ViPjwvcD4=
正确答案：QQ==
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
4/5单选题
难度：
4.
如图，在△ABC中. ∠B=90°，AB=5cm，BC=7cm，点P从点A开始沿AB边向点B以1cm/s的速度移动，点Q从点B开始沿BC边向点C以2cm/s的速度移动.
如果点P、Q分别从A、B同时出发，那么△PBQ的面积（1）能否等于4cm2？（2）能否等于7cm2 ( )
| A | （1）能，（2）也能 |
| B | （1）能，（2）不能 |
| C | （1）不能，（2）能 |
| D | （1）不能，（2）也不能 |
- 提示1：
- PHA+77yIMe+8ieiuvnjnp5LlkI7ilrNQQlHnmoTpnaLnp6/nrYnkuo40Y208c3VwPjI8L3N1cD7vvIzov5vogIzooajnpLrlh7pCUO+8jEJR55qE6ZW/77yM5Y2z5Y+v5b6X5Ye6562U5qGI77ybPC9wPg==
- 提示2：
- PHA+77yIMu+8ieagueaNru+8iDHvvInkuK3op6Pms5XooajnpLrlh7rilrNQQlHnmoTpnaLnp6/vvIzliKnnlKjmoLnnmoTliKTliKvlvI/vvIzljbPlj6/lvpflh7rnrZTmoYguPC9wPg==
正确答案：Qg==
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
5/5单选题
难度：
5.
如图，在△ABC中，∠B=90°，AB的长为6cm，BC的长为10，点P从点A开始，沿AB边向点B以1cm/s的速度移动，点Q从点B开始，沿BC边向点C以2cm/s的速度移动，如果P、Q分别从A、B同时出发，( )秒后△PBQ的面积等于8cm2.
| A | 2 |
| B | 4 |
| C | 2或4 |
| D | 6 |
- 提示1：
- PHA+5qC55o2u55u06KeS5LiJ6KeS5b2i55qE6Z2i56ev5YWs5byP5ZKM6Lev56iLPemAn+W6psOX5pe26Ze06L+b6KGM5rGC6Kej5Y2z5Y+vLjwvcD4=
正确答案：Qw==
PHA+6Kej562U77ya6K6+eOenkumSn+WQju+8jOKWs1BCUeeahOmdouenr+etieS6jjhjbTxzdXA+Mjwvc3VwPu+8jOeUsemimOaEj+WPr+W+l++8mjxicj4yeO+8iDYteO+8icO3Mj04PGJyPuino+W+l3g8c3ViPjE8L3N1Yj49Mu+8jHg8c3ViPjI8L3N1Yj49NC48YnI+57uP5qOA6aqM5Z2H5piv5Y6f5pa556iL55qE6KejLjxicj7nrZTvvJoy5oiWNOenkumSn+WQju+8jOKWs1BCUeeahOmdouenr+etieS6jjhjbTxzdXA+Mjwvc3VwPi48YnI+6YCJQzwvcD4=