本课配套习题挑战模式1/3
单选题
难度系数:
1.
如图给出了红豆生长时间t(月)与枝数y(枝)的散点图:那么“红豆生南国,春来发几枝”的红豆生长时间与枝数的关系用下列哪个函数模型拟合最好?( )
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:PHA+55Sx5pWj54K55Zu+55+l5Ye95pWw55qE5Zu+6LGh5Zyo56ys5LiA6LGh6ZmQ77yM5piv5LiA5Liq5Y2V6LCD6YCS5aKe55qE5Ye95pWw77yM5bm25LiU5aKe6ZW/55qE5q+U6L6D5b+rPC9wPg==
- 提示2:PHA+5Zu+6LGh6L+H77yIMe+8jDLvvInngrk8L3A+
- 答案:QQ==
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
本课配套习题挑战模式2/3
单选题
难度系数:
2.为了提高某种农作物的产量,农场通常采用喷施药物的方法控制其高度. 已知该农作物的平均高度y(米)与每公顷所喷施药物的质量x(千克/公顷)之间的关系如图所示,经验表明,该种农作物高度在1.25米左右时,它的产量最高,那么每公顷应喷施药物 ( )千克
A: 2.5 |
B: 3 |
C: 3.5 |
D: 4 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOeUseWbvuWDj+WPr+efpXnkuI5455qE5Ye95pWw5qih5Z6L5piv5LiA5qyh5Ye95pWw77yM5LiU6L+H54K577yIMO+8jDEuNe+8ieOAge+8iDEw77yMMC4177yJ
- 提示2:IOWIqeeUqOW+heWumuezu+aVsOazleaxguWHunnkuI5455qE5Ye95pWw6Kej5p6Q5byP77yM5YaN5rGC5b2TeT0xLjI15pe2eOeahOWAvA==
- 答案:QQ==
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
本课配套习题挑战模式3/3
单选题
难度系数:
3.一旅馆有100间相同的客房,经过一段时间经营实践,发现每间客房每天的定价与住房率有如下关系:
要使每天的收入最高,每间房定价应为( )
每间房定价 | 100元 | 90元 | 80元 | 60元 |
住房率 | 65% | 75% | 85% | 95% |
A: 100元 |
B: 90元 |
C: 80元 |
D: 60元 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruKAnOavj+WkqeaUtuWFpT3mgLvmiL/pl7TmlbDDl+S9j+aIv+eOh8OX5oi/6Ze05Lu35qC84oCd77yM5YiG5Yir566X5Ye65Zub56eN5oi/5Lu355qE5pS25YWl77yM54S25ZCO5YaN5q+U6L6D5bm26YCJ5oup5pS25YWl5pyA6auY55qE5a6a5Lu3
- 答案:Qw==
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