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某合金中铜和铁的物质的量均为0.3mol,将其全部投入b mL.4mol每升的硝酸溶液中，使其充分反应（假设NO是唯一的还原产物）。（1）若金属有剩余，其质量为m1 g,在溶液中在滴入稀硫酸后，神域金属为m2 g,则m1与m2的关系为m1___m2(填“>”，“<”或... 全文
2011-08-10 20:49 来自版块 -
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质量为4000kg的汽车，由静止开始一恒定的功率前进，它经100/3s的时间前进425m，这时候他达到最大速度15m/s,假设汽车在前进中所受阻力不变，求阻力位多大？一定要详解哦
2011-08-10 00:05 来自版块 -
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compare yourself now with and try to cxceed past achievements so that you can make progress step by step.A, what you used to be B, w... 全文
2011-08-09 23:59 来自版块 -
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I don't expect you can finish the work in three days,()?A.don't you B. do I C. can you D.can't you请老师详解一下反义疑问句，各种类型的
2011-08-07 00:01 来自版块 -
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已知f(x)=sin(wx+pai/3)(w>0,f(pai/6)=f(pai/3),且f(x)在区间（pai/6,pai/3）上有最小值，无最大值，则w=
2011-08-06 23:55 来自版块 -
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已知平面上三点ABC满足AB=5，BC=6，CA=7，则向量AB*向量BC+向量BC*向量CA+向量CA*向量AB的值等于求详解
2011-08-06 23:48 来自版块 -
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The nely built cafe ,the walls of are painted light green ,is really a peaceful place for us,specially after hard work.A that ... 全文
2011-08-06 01:10 来自版块 -
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as /which26. Wishing to get a million in the lottery， many among us now do，is simply foolish．A. which B. what C. ... 全文
2011-08-04 01:59 来自版块 -
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Just as the soil is a part of the earth,( )the atmosphere A.as it is B.the same is C.so is D.and so is 不是连接两个简单句必须有连接词吗？为什么选C啊
2011-08-03 23:10 来自版块 -
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At 20,Steve left his hometown,( ) not to return without realizing his dreamA.determing B.determined您看我分析的对吗答案是B 可以理解为是be determined to do我... 全文
2011-08-03 23:05 来自版块 -
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推荐几首能练听力的好听英文歌
2011-08-02 22:01 来自版块 -
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请推荐几个有意义的外国大片，想练习一下听力
2011-08-02 17:32 来自版块 -
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29.There are eight tips in Dr Roger’s lecture on —sleep, and one of them is : to bed early unless you think it is necessary.A. doesn’t g... 全文
2011-08-02 16:40 来自版块 -
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29.There are eight tips in Dr Roger’s lecture on —sleep, and one of them is : to bed early unless you think it is necessary.A. doesn’t g... 全文
2011-08-02 16:37 来自版块 -
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有I think not 吗 它和I hope not 哪个符合规律 我以前记得和那天老师讲的不一样
2011-07-29 19:15 来自版块 -
