本课配套习题挑战模式1/5
单选题
难度系数:
1.近视眼镜的度数y(度)与镜片焦距x(m)成反比例,已知200度近视眼镜镜片的焦距为0.5m,则y与x的函数关系式为( )
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:55Sx5LqO6L+R6KeG6ZWc5bqm5pWwee+8iOW6pu+8ieS4jumVnOeJh+eEpui3nXjvvIjnsbPvvInkuYvpl7TmiJDlj43mr5TkvovlhbPns7vlj6/orr55PTxpbWcgd2lkdGg9NyBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9CMC83My9yQkFDRTFWaW5WR3psb3NHQUFBQldUZ1lxX1E1NDcucG5nIj7vvIznlLEyMDDluqbov5Hop4bplZznmoTplZzniYfnhKbot53mmK8wLjXnsbPlhYjmsYLlvpdr55qE5YC877yO
- 答案:QQ==
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
本课配套习题挑战模式2/5
单选题
难度系数:
2.某闭合电路中,电源的电压为定值,电流I(A)与电阻R(Ω)成反比例.图表示的是该电路中电流I与电阻R之间函数关系的图象,则用电阻R表示电流I的函数解析式为( )
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:5Y+v6K6+ST08aW1nIHdpZHRoPTkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMTAvNTkvckJBQ0ZGVmluVld6TFlxZUFBQUJSbUctM09VNzg3LnBuZyI+77yM55Sx5LqO54K577yIM++8jDLvvInpgILlkIjov5nkuKrlh73mlbDop6PmnpDlvI/vvIzliJnlj6/msYLlvpdr55qE5YC877yO
- 答案:Qw==
6Kej77ya6K6+ST08aW1nIHdpZHRoPTkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMTAvNTkvckJBQ0ZGVmluVld6TFlxZUFBQUJSbUctM09VNzg3LnBuZyI+77yM6YKj5LmI54K577yIM++8jDLvvInpgILlkIjov5nkuKrlh73mlbDop6PmnpDlvI/vvIzliJlrPTPDlzI9Nu+8jDxicj7iiLRJPTxpbWcgd2lkdGg9OCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC83QS9ENS9yQkFDSmxWaW5WV1Q3Y3dRQUFBQlFPNGxnVHcwNDIucG5nIj7vvI48YnI+5pWF6YCJ77yaQ++8jg==
本课配套习题挑战模式3/5
单选题
难度系数:
3.某人对地面的压强与他和地面接触面积的函数关系如图所示.若某一沼泽地地面能承受的压强不超过300N/m2,那么此人必须站立在面积
( )的木板上才不至于下陷.(木板的重量忽略不计)
( )的木板上才不至于下陷.(木板的重量忽略不计)
A: 至少2m2 |
B: 至多2m2 |
C: 大于2m2 |
D: 小于2m2 |
一次做对,真牛!
+5奖励规则>
- 提示1:6aaW5YWI5qC55o2u5Zu+6LGh56Gu5a6a5Y+N5q+U5L6L5Ye95pWw55qE6Kej5p6Q5byP77yMIA==
- 提示2:54S25ZCO5Luj5YWlUD0zMDDmsYLlvpdT55qE5YC85Y2z5Y+v77yO
- 答案:QQ==
6Kej77ya6K6+5Ye95pWw55qE6Kej5p6Q5byP5Li6UD08aW1nIHdpZHRoPTcgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMTAvNTkvckJBQ0ZGVmluVm54UVVwUEFBQUJPbl8xcHFFMDY4LnBuZyI+77yMPGJyPuKItee7j+i/h+eCue+8iDEw77yMNjDvvIk8YnI+4oi0Rj1QUz0xMMOXNjA9NjAw77yMPGJyPuKItFA9PGltZyB3aWR0aD0yMCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC83QS9ENS9yQkFDSmxWaW5WbXpWYTgyQUFBQmNwbDlhdXM5OTYucG5nIj48YnI+5b2TUD0zMDDml7bvvIw8YnI+Uz0y77yMPGJyPuaVhemAiUHvvI4=
本课配套习题挑战模式4/5
单选题
难度系数:
4.一辆汽车匀速通过某段公路,所需时间t(h)与行驶速度v(km/h)满足函数关系t=(k是常数),其图象为如图所示的一段双曲线,端点为A(40,1)和B(m,0.5).则k和m的值为( )
A: 40,80 |
B: 40,60 |
C: 80,80 |
D: 80,60 |
一次做对,真牛!
+5奖励规则>
- 提示1:5bCG54K5Qe+8iDQw77yMMe+8ieS7o+WFpXQ9PGltZyB3aWR0aD03IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzEwLzU5L3JCQUNGRlZpblZfaExCLUFBQUFCVmdDNUxiVTc5Ny5wbmciPu+8jOaxguW+l2vvvIwg
- 提示2:5YaN5oqK54K5QuS7o+WFpeaxguWHuueahOino+aekOW8j+S4re+8jOaxguW+l23nmoTlgLzvvI4=
- 答案:QQ==
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
本课配套习题挑战模式5/5
单选题
难度系数:
5.某蔬菜生产基地在气温较低时,用装有恒温系统的大棚栽培一种在自然光照且温度为18℃的条件下生长最快的新品种.如图是某天恒温系统从开启到关闭及关闭后,大棚内温度y(℃)随时间x(小时)变化的函数图象,其中BC段是双曲线y=(k≠0)的一部分,则当x=16时,大棚内的温度约为( )
A: 18℃ |
B: 15.5℃ |
C: 13.5℃ |
D: 12℃ |
一次做对,真牛!
+5奖励规则>
- 提示1:5Yip55So5b6F5a6a57O75pWw5rOV5rGC5Y+N5q+U5L6L5Ye95pWw6Kej5p6Q5byP5ZCO5bCGeD0xNuS7o+WFpeWHveaVsOino+aekOW8j+axguWHunnnmoTlgLzljbPlj6/vvI4=
- 答案:Qw==
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