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- 2The sea is very rough today.求翻译
- 3设a.b是有理数,且a.b满足等式a^2+2b+√2*b=17-4√2,求的值
- 4描写春天的成语
- 5I_______ (坐飞机)to Hainan last week. 按照所给提示填空,这应该填什么
- 6对括号里的部分提问:There are (some clothes) in the closet.
- 7A how much cost they are B how much do they cost C how much they cost D how much are they cost.我搞不清楚BC的区别,希望明白的人给我讲明白些.
- 8某物流公司,要将300吨物资运往某地,现有A、B两种型号的车可供调用,已知A型车每辆可装20吨,B型车每辆可装15吨,在每辆车不超载的条件下,把300吨物资装运完.问:在已确定调用5辆A型
- 9已知tan(π/4+α)=1/2,求cos2α/(sin2α+cos^2α)
- 10A.B.C.D.E分别是常见的酸,碱,盐,中的某种物质,并且已知A是含钠元素的化合物,他们之间有如下关系