这几道英文题怎么做啊?1, when he arrived at the bus stop, the bus___for 20 minutes. A,has left. B,had left. C,has been away. D,had been away.
2,I __ the League for 5 years so far. A,joined. B,have joined. C,have been in
3,You mustn't __ un_百度作业帮
这几道英文题怎么做啊?1, when he arrived at the bus stop, the bus___for 20 minutes. A,has left. B,had left. C,has been away. D,had been away.
2,I __ the League for 5 years so far. A,joined. B,have joined. C,have been in
3,You mustn't __ un
这几道英文题怎么做啊?1, when he arrived at the bus stop, the bus___for 20 minutes. A,has left. B,had left. C,has been away. D,had been away.
2,I __ the League for 5 years so far. A,joined. B,have joined. C,have been in
3,You mustn't __ until he comes back. A,be away. B,leave. C,be left
4,The meeting __ for a week now. A,has finished. B,has ended C,has been over
5,Ben __ a teacher for 4 years A,has been B,has become C,was D,became
6,I __ home for a week A,have returned B,have been back C,returned
7,How long __ he __? A,died B,has,died C,has, been dead
8,The bus __ on the road for 2 hours so far. A,has stopped B,stopped C,has been
9,Since 2000,he __ his hometown A,has left B,has moved away C,has been away from
禁封JF0323
D C B C A B C C C
扫描下载二维码请问老师，这道题怎么做？两个工程队共同开凿一条117米长的隧道，各从一端相向施工，13天打通，甲队每天开凿4米，乙队每天开凿多少米？用方程怎么分析 - 同桌100学习网
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请问老师，这道题怎么做？两个工程队共同开凿一条117米长的隧道，各从一端相向施工，13天打通，甲队每天开凿4米，乙队每天开凿多少米？用方程怎么分析
请问老师，这道题怎么做？两个工程队共同开凿一条117米长的隧道，各从一端相向施工，13天打通，甲队每天开凿4米，乙队每天开凿多少米？用方程怎么分析
提问者：127511
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解：设乙每天开x米.
效率和×工作时间=工作总量
（4+x）×13=117
4×13+13x=117
答：乙每天开5米。
回答者：teacher063
两队合作每天开凿米数：117÷13=9（米）
乙队每天米数：9-4=5（米）
设乙队开凿x米
所以4+x=117/9
回答者：teacher072
设乙队每天开凿x米
13*（4+x)=117
回答者：teacher061您的举报已经提交成功，我们将尽快处理，谢谢！
应该是信任感。
如果做成北京知名的代驾公司，象大陆救援一样，会被接受和发展起来的。
这是因为征途的问题，不关你的事。现在征途只是个四向的游戏，还没做成八向的。如果一般做得好的游戏是32向的。传奇是八向的。所以跑起路来会走曲线而不是直线，斜着走的...
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(window.slotbydup=window.slotbydup || []).push({
id: '2081942',
container: s,
size: '1000,60',
display: 'inlay-fix'这样，2分的60个，5分的36个，1分的108个
共计：4元8分
您的举报已经提交成功，我们将尽快处理，谢谢！
设：短绳长X米。
4.5+X=2.5X
解得：X=3
长绳为：3+4.5=7.5(米)
答：长绳长7.5米，短绳长3米。
甲乙两根绳子共长22米，甲绳截去1/5后，乙绳和甲绳的长度比是3：2，甲绳原来长多少米？
以题所得：甲绳截去1/5后，剩余1-1/5=4/5
乙绳和甲绳的长...
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(window.slotbydup=window.slotbydup || []).push({
id: '2081942',
container: s,
size: '1000,60',
display: 'inlay-fix'}