本课配套习题挑战模式1/5
单选题
难度系数:
1.修一条长1200米的水渠,由甲、乙两队从两头同时施工,甲队每天挖100米,乙队每天挖50米,需要x天才能挖好,由题意可得方程()
A: 100x+50x=1200 |
B: 100+50x=1200 |
C: 100x+50=1200 |
D: (100-50)x=1200 |
一次做对,真牛!
+5奖励规则>
- 提示1:5YiX5pa556iL6Kej5bqU55So6aKY
- 提示2:6aKY55uu5YWz57O75byP77ya55Sy5bel5pWIw5fml7bpl7Qr5LmZ5bel5pWIw5fml7bpl7Q9MTIwMA==
- 答案:QQ==
55Sx6aKY55uu5YWz57O75byP77ya55Sy5bel5pWIw5fml7bpl7Qr5LmZ5bel5pWIw5fml7bpl7Q9MTIwMO+8jOW+lzEwMHgrNTB4PTEyMDA=
本课配套习题挑战模式2/5
单选题
难度系数:
2.某船顺流航行的速度为20km/h,逆流航行的速度为16km/h,则水流的速度为()
A: 2km/h |
B: 4km/h |
C: 18km/h |
D: 36km/h |
一次做对,真牛!
+5奖励规则>
- 提示1:6KGM56iL6Zeu6aKY55qE5rC05rWB6Zeu6aKY5YWs5byP
- 提示2:6aG65rC06YCf5bqmPemdmeawtOmAn+W6pivmsLTmtYHpgJ/luqbvvJvpgIbmsLTpgJ/luqY96Z2Z5rC06YCf5bqm4oCU5rC05rWB6YCf5bqm
- 答案:QQ==
55Sx5Lik5Liq5YWs5byP77ya6aG65rC06YCf5bqmPemdmeawtOmAn+W6pivmsLTmtYHpgJ/luqbvvJvpgIbmsLTpgJ/luqY96Z2Z5rC06YCf5bqm4oCU5rC05rWB6YCf5bqm77yM6K6+6Z2Z5rC06YCf5bqm5Li6eCBrbe+8j2gs5YiZ5rC05rWB6YCf5bqm5Li6KDIwLXgpIGtt77yPaCzliJfmlrnnqIvvvIzlvpfvvJp4LSgyMC14KT0xNizop6Plvpd4PTI=
本课配套习题挑战模式3/5
单选题
难度系数:
3.一艘货轮往返于上、下游两个码头,逆流而上需用38时,顺流而下需用32时,若水流速度为8千米/时,则下列求两码头距离x的方程正确的是()
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:6KGM56iL6Zeu6aKY55qE5rC05rWB6Zeu6aKY5YWs5byP
- 提示2:6aG65rC06YCf5bqmPemdmeawtOmAn+W6pivmsLTmtYHpgJ/luqbvvJvpgIbmsLTpgJ/luqY96Z2Z5rC06YCf5bqm4oCU5rC05rWB6YCf5bqm
- 提示3:6aKY55uu5YWz57O75byP77ya6Lev56iLPGltZyB3aWR0aD0xMCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8zRS9CQy9yQkFDSmxUSXVHaWpOX1hFQUFBQXo3MGw2NEU0NzYucG5nIj7pobrmsLTml7bpl7Qt5rC05rWB6YCf5bqmPei3r+eoizxpbWcgd2lkdGg9MTAgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvQkMvckJBQ0psVEl1R2lqTl9YRUFBQUF6NzBsNjRFNDc2LnBuZyI+6YCG5rC05pe26Ze0K+awtOa1gemAn+W6pg==
- 答案:Qg==
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
本课配套习题挑战模式4/5
单选题
难度系数:
4.学校组织劳动,在甲处有31人,在乙处有20人,现调来18人分别派往甲、乙两处,使在甲处的人数是乙处人数的两倍,则派往甲、乙两处的人数分别是()
A: 3,15 |
B: 15,3 |
C: 14,4 |
D: 4,14 |
一次做对,真牛!
+5奖励规则>
- 提示1:5YiX5pa556iL6Kej5bqU55So6aKY
- 提示2:6aKY55uu5YWz57O75byP77yaPGltZyB3aWR0aD0yMjYgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQUEvNDcvckJBQ0ZGVEl1RnpBcmZNekFBQURaZzlKMUtFMjg4LnBuZyI+
- 答案:Qg==
6Kej77ya6K6+6LCD5YWl55SyeOS6uu+8jOiwg+WFpeS5mSgxOC14KeS6uuOAguWIl+aWueeoi++8jOW+l+KAnDxpbWcgd2lkdGg9MjE4IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzNFL0JDL3JCQUNKbFRJdUZ5REdJcWNBQUFEaG9UYWhZSTY5MS5wbmciPng9MTU=
本课配套习题挑战模式5/5
单选题
难度系数:
5.有64名学生外出参加竞赛,共租车10辆,其中大客车每辆可坐8人,小客车每辆可坐4人,则大、小客车各租()
A: 4辆,6辆 |
B: 6辆,4辆 |
C: 5辆,5辆 |
D: 2辆,8辆 |
一次做对,真牛!
+5奖励规则>
- 提示1:5YiX5pa556iL6Kej5bqU55So6aKY
- 提示2:6aKY55uu5YWz57O75byP77ya5aSn5a6i6L2m5pWw6YePw5flpKflrqLovabmr4/ovobkuZjlnZDkurrmlbAr5bCP5a6i6L2m5pWw6YePw5flsI/lrqLovabmr4/ovobkuZjlnZDkurrmlbA95oC75Lq65pWw
- 答案:Qg==
6Kej77ya6K6+5aSn5a6i6L2meOi+hu+8jOWwj+Wuoui9pu+8iDE4LXjvvInovobjgILliJfmlrnnqIvvvIzlvpfvvJo4eCs0KDEwLXgpPTY0LOino+W+l3g9Ni4=