1/5单选题
难度：
1.
某车队要把60吨货物从甲地运往乙地. 已知大卡车每次可运10吨，运费200元；小卡车每次可运4吨，运费90元. 请设计一种最优租车方案（运费最省），
在你设计的最优方案中，一共用了（ ）辆小卡车和（ ）辆大卡车
| A | 一共用了3辆小卡车和4辆大卡车 |
| B | 一共用了2辆小卡车和4辆大卡车 |
| C | 一共用了1辆小卡车和4辆大卡车 |
| D | 一共用了4辆小卡车和4辆大卡车 |
- 提示1：
- PHA+5aSn5Y2h6L2m5q+P5ZCo55qE6L+Q6LS55pivMjAww7cxMD0yMOWFg++8jOWwj+WNoei9puavj+WQqOeahOi/kOi0ueaYrzkww7c0PTIyLjXlhYPvvIzmiYDku6XlsL3ph4/nlKjlpKfljaHovabmr5TovoPkvr/lrpw8L3A+
- 提示2：
- PHA+6ICMOTY9ODArMTY9OMOXMTArNMOXNO+8jOaJgOS7pemcgOimgTjovoblpKfljaHovablkow06L6G5bCP5Y2h6L2m6KaB5oOz6K6+6K6h5Ye65oC76L+Q6LS55pyA5bCR55qE5pa55qGIPC9wPg==
正确答案：RA==
PGRpdj7op6PvvJrlm6DkuLrlpKfljaHovabmr4/lkKjnmoTov5DotLnmmK/vvJoyMDDDtzEwPTIw77yI5YWD77yJ77yMPGJyPuWwj+WNoei9puavj+WQqOeahOi/kOi0ueaYr++8mjkww7c0PTIyLjXvvIjlhYPvvInvvIw8YnI+MjDvvJwyMi4177yMPGJyPuaJgOS7peWwvemHj+eUqOWkp+WNoei9puavlOi+g+S+v+WunO+8jOiAjDYwPTQwKzIwPTTDlzEwKzTDlzXvvIw8YnI+5omA5Lul55SoNOi+huWkp+WNoei9puWSjDXovoblsI/ljaHovablsIY5NuWQqOi0p+eJqeS4gOasoeS7jueUsuWcsOi/kOW+gOS5meWcsC48YnI+562U77ya5LiA5YWx55So5LqGNOi+huWwj+WNoei9puWSjDTovoblpKfljaHovaY8L2Rpdj4=
2/5单选题
难度：
2.
北京和上海分别制成了同一型号的电子计算机若干台，除本地应用外，北京可支援外地20台，上海可支援外地10台，现在决定给重庆16台，郑州14台. 若每台计算机的运费如图（单位：元）. （ ）运输方案，能使总的运费最省
| A | 上海运往重庆0台，上海运往郑州10台，北京运往重庆16台，北京运往郑州4台 |
| B | 上海运往重庆10台，上海运往郑州0台，北京运往重庆4台，北京运往郑州16台 |
| C | 上海运往重庆10台，上海运往郑州0台，北京运往重庆16台，北京运往郑州4台 |
| D | 上海运往重庆0台，上海运往郑州10台，北京运往重庆4台，北京运往郑州16台 |
- 提示1：
- PHA+5pyA55yB55qE5oC755qE6L+Q6LS55piv6ZqP552A6L+Q5b6A5p+Q5Zyw55qE5Y+w5pWw55qE5Y+Y5YyW6ICM5Y+Y5YyW55qEPC9wPg==
- 提示2：
- PHA+5qC55o2u4oCc5oC76L+Q6LS5PeWbm+WcsOeahOi/kOi0ueaAu+WSjOKAneWIl+WHuuaWueeoi++8jOeEtuWQjuiuqOiuuuaegeWAvO+8jOWNs+WPr+W+l+WHuue7k+iuujwvcD4=
正确答案：QQ==
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
3/5单选题
难度：
3.
某校六年级共有师生230人准备租车出去秋游. 已知大客车每辆限坐42人，每天租金1000元；中巴每辆限坐24人，每天租金600元. （ ）租车方案，最合算
| A | 租大客车4辆，中巴车2辆 |
| B | 租大客车5辆，中巴车1辆 |
| C | 租大客车1辆，中巴车5辆 |
| D | 租大客车2辆，中巴车4辆 |
- 提示1：
- PHA+5qC55o2u6aKY5oSP55+l6YGT77yM5aSn5a6i6L2m77yM5q+P5Liq5bqn5L2N6LS555So5Li6MTAwMMO3NDLiiYgyNOWFg++8jOS4reW3tOi9pu+8jOavj+S4quW6p+S9jei0ueeUqOS4ujYwMMO3MjQ9MjXlhYPvvIzmmL7nhLblsL3lj6/og73lpJrph4fnlKjlpKflrqLovabvvIzlubbkuJTnqbrluqfkvY3mnIDlsJHml7bkvr/lrpwuPC9wPg==
正确答案：Qg==
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
4/5单选题
难度：
4.
某公司在A、B两地分别有库存机器16台和12台，现要运往甲、乙两地，其中甲地15台，乙地13台，从A地运一台到甲地的运费为500元，到乙地的运费为400元，从B地运一台到甲地的运300元，到乙地为600元，公司应怎样设计（ ）调运方案，能使这些机器的总运费最省（设从A运到甲地的机器为X台，总运费为Y元）.
| A | 从A地运往甲地2台，从A地运往乙地14台，从B地运往甲地12台，从B地运往乙地0台 |
| B | 从A地运往甲地3台，从A地运往乙地13台，从B地运往甲地10台，从B地运往乙地2台 |
| C | 从A地运往甲地3台，从A地运往乙地13台，从B地运往甲地12台，从B地运往乙地0台 |
| D | 从A地运往甲地2台，从A地运往乙地14台，从B地运往甲地10台，从B地运往乙地2台 |
- 提示1：
- PHA+5oC76L+Q6LS55bqU562J5LqO6L+Q5b6A5LiN5ZCM5Zyw5pa55LiA5Y+w5py65Zmo55qE6L+Q6LS5w5fnm7jlupTnmoTlj7DmlbDnmoTotLnnlKjnmoTlkow8L3A+
- 提示2：
- PHA+5qC55o2u5Y+w5pWw5Li66Z2e6LSf5pWw5Y+v5b6X6Ieq5Y+Y6YeP55qE5Y+W5YC86IyD5Zu0PC9wPg==
- 提示3：
- PHA+5qC55o2u5oC76L+Q6LS555qE5Ye95pWw5YWz57O75byP5Lul5Y+K6Ieq5Y+Y6YeP55qE5Y+W5YC85Y+v5b6X5pyA55yB6L+Q6LS555qE5pa55qGILjwvcD4=
正确答案：Qw==
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
5/5单选题
难度：
5.
煤炭是龙岩市的主要矿产资源之一，每天有大量的煤炭运往外地. 某煤矿现有100吨煤炭要运往甲、乙两厂. 通过了解获得甲、乙两厂的有关信息如下表：（表中运费栏“元/t•km”表示每吨煤炭运送二千米所需人民币）
要把100吨煤全部运出，试写出总运费y（元）与运往甲厂x（吨）煤炭之间的函数关系式；如果你是该矿的矿主，（ ）方案，能使所需的总运费最低
| A | 运往甲厂20吨，乙厂80吨 |
| B | 运往甲厂30吨，乙厂70吨 |
| C | 运往甲厂40吨，乙厂60吨 |
| D | 运往甲厂50吨，乙厂50吨 |
- 提示1：
- PHA+5oC76LS555SoPei/kOW+gOeUsuWOgueahOi0ueeUqCvov5DlvoDkuZnljoLnmoTotLnnlKguPC9wPg==
- 提示2：
- PHA+5qC55o2u5Zu+6KGo5Lit57uZ5Ye655qE5Yik5a6a5ZCo5pWw55qE5p2h5Lu277yM566X5Ye66Ieq5Y+Y6YeP55qE5Y+W5YC86IyD5Zu077yM54S25ZCO5qC55o2u5Ye95pWw55qE5oCn6LSo5p2l566X5Ye65omA5rGC55qE5pa55qGILjwvcD4=
正确答案：QQ==
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