挑战习题
1
/5
单选题
难度:
1.某工厂已有某零件75个,一个工人每天可生产这种零件30个,现有一紧急任务,一天内急需这种零件580个,那么至少安排多少工人才能满足供货需求( )
A
16人
B
17人
C
18人
D
19人
提示1:
IOiuvuiHs+WwkeWuieaOkuW3peS6uueahOS6uuaVsOS4unjvvIzliJnmoLnmja7popjmhI/mnInkuI3nrYnlhbPns7vvvJo3NSszMHjiiaU1ODDvvIzop6Plh7rljbPlj68u
正确答案:
Qg==
6Kej77ya6K6+6Iez5bCR5a6J5o6S5bel5Lq655qE5Lq65pWw5Li6eO+8jDxicj7liJnmnIk3NSszMHjiiaU1ODDvvIw8YnI+6Kej5b6X77yaeOKJpTxpbWcgd2lkdGg9MTYgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0MvMTIvckJBQ0UxTnNSUVdRakNXQUFBQUJVcC1aS3hnNDE1LnBuZyI+4omIMTYuOO+8jDxicj7mlYXoh7PlsJHlronmjpIxN+S6ui4gPGJyPuaVhemAiUIuIA==
2
/5
单选题
难度:
2.现用甲、乙两种运输车将46吨抗旱物资运往灾区,甲种运输车载重5吨,乙种运输车载重4吨,安排车辆不超过10辆,则甲种运输车至少应安排( )
A
4辆
B
5辆
C
6辆
D
7辆
提示1:
IOiuvueUsuenjei/kOi+k+i9puiHs+WwkeWuieaOknjovobvvIzmoLnmja7nlLLjgIHkuZnkuKTnp43ov5DovpPovablsIY0NuWQqOaKl+aXseeJqei1hOi/kOW+gOeBvuWMuu+8jOeUsuenjei/kOi+k+i9pui9vemHjTXlkKjvvIzkuZnnp43ov5DovpPovabovb3ph4005ZCo77yM5a6J5o6S6L2m6L6G5LiN6LaF6L+HMTDovobvvIzlj6/liJfkuI3nrYnlvI/msYLop6Mu
正确答案:
Qw==
6Kej77ya6K6+55Sy56eN6L+Q6L6T6L2m6Iez5bCR5a6J5o6SeOi+hu+8jDxicj41eCs077yIMTAteO+8ieKJpTQ2PGJyPnjiiaU2PGJyPuaVheiHs+WwkeeUsuimgTbovobovaYuIDxicj7mlYXpgIlDLiA=
3
/5
单选题
难度:
3.用若干辆载重量为6千克的货车运一批货物,若每辆汽车只装4千克,则剩下18千克货物;若每辆汽车只装6千克,则最后一辆货车装的货物不足5千克. 若设有x辆货车,则x应满足的不等式组是( )
A
B
C
D
提示1:
IOiuvuaciXjovobotKfovabvvIzmr4/ovobmsb3ovablj6roo4U05Y2D5YWL77yM5YiZ5Ymp5LiLMTjljYPlhYvotKfnianvvIzotKfnianmgLvph43kuLrvvIg0eCsxOO+8ieWNg+WFi++8jOavj+i+huaxvei9puWPquijhTbljYPlhYvvvIzliJnmnIDlkI7kuIDovobotKfovaboo4XnmoTotKfniankuI3otrM15Y2D5YWL77yM5qC55o2u562J6YeP5YWz57O777yM5Y+v5b6X5Yiw5LiN562J5byP5Li677yaNHgrMTgtNu+8iHgtMe+8ie+8nDXlkow0eCsxOC0277yIeC0x77yJ77yeMC4=
正确答案:
RA==
6Kej77ya6K6+5pyJeOi+hui0p+i9pu+8jDxicj7mr4/ovobmsb3ovablj6roo4U05Y2D5YWL77yM5YiZ5Ymp5LiLMTjljYPlhYvotKfnianvvIw8YnI+5omA5Lul77yM6LSn54mp5oC76YeN5Li677yINHgrMTjvvInljYPlhYvvvIw8YnI+5q+P6L6G5rG96L2m5Y+q6KOFNuWNg+WFi++8jOWImeacgOWQjuS4gOi+hui0p+i9puijheeahOi0p+eJqeS4jei2szXljYPlhYvvvIw8YnI+5qC55o2u562J6YeP5YWz57O777yM5Y+v5b6X5Yiw5LiN562J5byP5Li677yaPGJyPjR4KzE4LTbvvIh4LTHvvInvvJw15ZKMNHgrMTgtNu+8iHgtMe+8ie+8njAuIDxicj7mlYXpgIlELiA=
4
/5
单选题
难度:
4.将一箱苹果分给若干个小朋友,若每位小朋友分5个苹果,则还剩12个苹果;若每位小朋友分8个苹果,则有一个小朋友所分苹果不到8个. 若小朋友的人数为x,则列式正确的是( )
A
0≤5x+12-8(x-1)<8
B
0<5x+12-8(x-1)≤8
C
1≤5x+12-8(x-1)<8
D
1<5x+12-8(x-1)≤8
提示1:
IOagueaNruavj+S9jeWwj+aci+WPi+WIhjXkuKroi7nmnpzvvIzliJnov5jliakxMuS4quiLueaenO+8m+iLpeavj+S9jeWwj+aci+WPi+WIhjjkuKroi7nmnpzvvIzliJnmnInkuIDkuKrlsI/mnIvlj4vmiYDliIboi7nmnpzkuI3liLA45LiqLiDnlLHmraTlvpflh7rkuI3nrYnlvI/nu4Qu
正确答案:
Qw==
6Kej77ya5qC55o2u5bCP5pyL5Y+L55qE5Lq65pWw5Li6eO+8jOagueaNrumimOaEj+WPr+W+l++8mjxicj4x4omkNXgrMTItOO+8iHgtMe+8ie+8nDjvvIw8YnI+5pWF6YCJ77yaQy4g
5
/5
单选题
难度:
5.八年级某班级部分同学去植树,若每人平均植树7棵,还剩9棵,若每人平均植树9棵,则有1位同学植树的棵数不到8棵. 若设同学人数为x人,植树的棵数为(7x+9)棵,下列各项能准确的求出同学人数与种植的树木的数量的是( )
A
7x+9≤8+9(x-1)
B
7x+9≥9(x-1)
C
D
提示1:
IOS4jeWIsDjmo7XmhI/mgJ3mmK/mpI3moJHmo7XmoJHlnKgw5qO15ZKMOOajteS5i+mXtO+8jOWMheaLrDDmo7XvvIzkuI3ljIXmi6w45qO177yM5YWz57O75byP5Li677ya5qSN5qCR55qE5oC75qO15qCR4oml77yIeC0x77yJ5L2N5ZCM5a2m5qSN5qCR55qE5qO15qCR77yM5qSN5qCR55qE5oC75qO15qCR77ycOCvvvIh4LTHvvInkvY3lkIzlrabmpI3moJHnmoTmo7XmoJHvvIzmiornm7jlhbPmlbDlgLzku6PlhaXljbPlj68u
正确答案:
Qw==
6Kej77ya77yIeC0x77yJ5L2N5ZCM5a2m5qSN5qCR5qO15qCR5Li6OcOX77yIeC0x77yJ77yMPGJyPuKIteaciTHkvY3lkIzlrabmpI3moJHnmoTmo7XmlbDkuI3liLA45qO1LiDmpI3moJHnmoTmo7XmlbDkuLrvvIg3eCs577yJ5qO177yMPGJyPuKItOWPr+S4jeetieW8j+e7hOS4uu+8mjxpbWcgd2lkdGg9MTM3IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzAwLzA4L3JCQUNGRk5zUlNYaHZ2Rk1BQUFEaGJYRDl5YzgyMy5wbmciPjxicj7mlYXpgIlDLiA=