1/5单选题
难度：
1.
如图，现有正三角形纸板150个，长方形纸板180个，正三角形的边长等于长方形的一边长，一个数学兴趣小组的同学想利用这些材料做成正三棱柱和正三棱锥模型共60个（两种模型都要求有），共有（ ）种加工方案.
| A | 13 |
| B | 14 |
| C | 15 |
| D | 16 |
- 提示1：
- 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
- 提示2：
- PHA+5qC55o2u4oCc5q2j5LiJ5qOx5p+x5ZKM5q2j5LiJ5qOx6ZSl5qih5Z6L5omA6ZyA6ZW/5pa55b2i57q45p2/5pWwPGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzAwLzU5L3JCQUNGRk1NVXdfakp6SWdBQUFCZnhTTWFLdzkwNC5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvNTkvckJBQ0ZGTU1Vd19qSnpJZ0FBQUJmeFNNYUt3OTA0LnBuZyIgaGVpZ2h0PSIyMSIgd2lkdGg9IjM4Ij7kuKrvvIzigJ3liJflh7rkuI3nrYnlvI/vvJs8YnI+PC9wPg==
- 提示3：
- PHA+5qC55o2u5LiN562J5byP57uE55qE6Kej5Y+W5pW05pWw77yM56Gu5a6a5pa55qGI44CCPGJyPjwvcD4=
正确答案：Qw==
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
2/5单选题
难度：
2.
公司计划用不超过500万元的资金购买单价为60万元、70万元的甲、乙两种设备. 根据需要，甲种设备至少买3套，乙种设备至少买2套，则不同的购买方式共有（ ）种.
| A | 5 |
| B | 6 |
| C | 7 |
| D | 8 |
- 提示1：
- PHA+6K6+6LSt5Lmw55Sy56eN6K6+5aSHeOWPsO+8jOS5meenjeiuvuWkh3nlj7A8L3A+
- 提示2：
- PHA+5qC55o2u6LWE6YeR5LiN6LaF6L+HNTAw5LiH5YWD77yM5b6X5Yiw5LiA5Liq5LiN562J5YWz57O777yM5qC55o2u5LmZ56eN6K6+5aSH6Iez5bCRM+Wll++8jOW+l+WHuuesrOS6jOS4quS4jeetieWFs+ezu++8mzxicj48L3A+
- 提示3：
- PHA+5qC55o2u5LiN562J5byP57uE55qE6Kej56Gu5a6a5pW05pWw6KejPC9wPg==
正确答案：Qw==
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
3/5单选题
难度：
3.
某校准备组织290名学生进行野外考察活动，行李共有100件. 学校计划租用甲、乙两种型号的汽车共8辆，经了解，甲 种汽车每辆最多能载40人和10件行李，乙种汽车每辆最多能载30人和20件行李. 如果甲、乙两种汽车每辆的租车费用分别为2000元、1800元，请你选择（）种方案最省钱.
| A | 甲5辆，乙3辆 |
| B | 甲6辆，乙2辆 |
| C | 甲4辆，乙4辆 |
| D | 甲7辆，乙1辆 |
- 提示1：
- 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
- 提示2：
- PHA+5qC55o2u4oCc5bqn5L2N5oC75pWw6KaB4omlMjkw77yM6IO96L2955qE6KGM5p2O5oC75pWw4omlMTAw4oCd5Y+v5b6X5LiN562J5byP57uE77ybPC9wPg==
- 提示3：
- PHA+5qC55o2u5LiN562J5byP57uE55qE6Kej56Gu5a6a5pyA55yB6LS555So55qE56ef6L2m5pa55qGIPC9wPg==
正确答案：QQ==
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
4/5单选题
难度：
4.某中学为了绿化校园，计划购买一批榕树和香樟树，经市场调查榕树的单价比香樟树少20元，购买3棵榕树和2棵香樟树共需340元. 根据学校实际情况，需购买两种树苗共150棵，总费用不超过10840元，且购买香樟树的棵树不少于榕树的1.5倍，请你算算，该校本次购买榕树和香樟树共有（ ）种方案.
| A | 2 |
| B | 3 |
| C | 4 |
| D | 5 |
- 提示1：
- 6K6+5qaV5qCR55qE5Y2V5Lu35Li6eOWFgy/mo7XvvIzpppnmqJ/moJHnmoTljZXku7fmmK955YWDL+ajte+8jOeEtuWQjuagueaNruWNleS7t+S5i+mXtOeahOWFs+ezu+WSjDM0MOWFg+S4pOS4quetiemHj+WFs+ezu+WIl+WHuuS6jOWFg+S4gOasoeaWueeoi+e7hO+8mw==
- 提示2：
- IOiuvui0reS5sOamleagkWHmo7XvvIzooajnpLrlh7rpppnmqJ/moJHkuLrvvIgxNTAtYe+8ieajte+8jOeEtuWQjuagueaNruaAu+i0ueeUqOWSjOS4pOenjeagkeeahOajteaVsOWFs+ezu+WIl+WHuuS4jeetieW8j+e7hO+8mw==
- 提示3：
- IOaxguWHumHnmoTlj5blgLzojIPlm7TvvIzlnKjmoLnmja5h5piv5q2j5pW05pWw56Gu5a6a5Ye66LSt5Lmw5pa55qGILg==
正确答案：Qg==
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
5/5单选题
难度：
5.
某学校为了改善办学条件，计划购置一批电子白板和一批笔记本电脑，经投标，购买1块电子白板比买3台笔记本电脑多3000元，购买4块电子白板和5台笔记本电脑共需80000元. 根据该校实际情况，需购买电子白板和笔记本电脑的总数为396，要求购买的总费用不超过2700000元，并购买笔记本电脑的台数不超过购买电子白板数量的3倍，该校有多种购买方案，按最省钱方案购买需要（）钱。
| A | 2695000 |
| B | 2684000 |
| C | 2637000 |
| D | 2673000 |
- 提示1：
- PHA+6K6+6LSt5LmwMeWdl+eUteWtkOeZveadv+mcgOimgXjlhYPvvIzkuIDlj7DnrJTorrDmnKznlLXohJHpnIDopoF55YWD77yM55Sx6aKY5oSP5b6X562J6YeP5YWz57O777ya4pGg5LmwMeWdl+eUteWtkOeZveadv+eahOmSsT3kubAz5Y+w56yU6K6w5pys55S16ISR55qE6ZKxKzMwMDDlhYPvvIzikaHotK3kubA05Z2X55S15a2Q55m95p2/55qE6LS555SoKzXlj7DnrJTorrDmnKznlLXohJHnmoTotLnnlKg9ODAwMDDlhYPvvIznlLHnrYnph4/lhbPns7vlj6/lvpfmlrnnqIvnu4Q8L3A+
- 提示2：
- PHA+6K6+6LSt5Lmw55S15a2Q55m95p2/YeWdl++8jOWImei0reS5sOeslOiusOacrOeUteiEke+8iDM5Ni1h77yJ5Y+w77yM55Sx6aKY5oSP5b6X5LiN562J5YWz57O777ya4pGg6LSt5Lmw56yU6K6w5pys55S16ISR55qE5Y+w5pWw4omk6LSt5Lmw55S15a2Q55m95p2/5pWw6YeP55qEM+WAje+8m+KRoeeUteWtkOeZveadv+WSjOeslOiusOacrOeUteiEkeaAu+i0ueeUqOKJpDI3MDAwMDDlhYPvvIzmoLnmja7kuI3nrYnlhbPns7vlj6/lvpfkuI3nrYnlvI/nu4Q8L3A+
- 提示3：
- PHA+6Kej5LiN562J5byP57uE77yM5rGC5Ye65pW05pWw6Kej77yM55Sx5LqO55S15a2Q55m95p2/6LS177yM5pWF5bCR5Lmw55S15a2Q55m95p2/77yM5aSa5Lmw55S16ISR77yM5qC55o2u5pa55qGI56Gu5a6a5Lmw55qE55S16ISR5pWw5LiO55S15a2Q55m95p2/5pWw77yM5YaN566X5Ye65oC76LS555So5q+U6L6D5aSn5bCP44CCPC9wPg==
正确答案：RA==
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