答得好+50分!1.----OH,there is someone in the room.----( ) must be my beother.A.He B.This C.It2.Linda always takes ( ) active part in sports after school.A./ B.a C.an3.This is my twin sister Lucy .Both she and I ( ) good at drawingA.am B.is C.are

科学题 答得好50分 答得好加50分 答得好,加50分 答得好+50分!1.----OH,there is someone in the room.----( ) must be my beother.A.He B.This C.It2.Linda always takes ( ) active part in sports after school.A./ B.a C.an3.This is my twin sister Lucy .Both she and I ( ) good at drawingA.am B.is C.are 答得好给分. 答得好追加分 3道化学题（50分.2道是填空.答得好的加50分）1.CO2在NaOH溶液中完全反应,所得溶液质量88.8g.蒸干溶液得21.2g固体,求NaOH溶液的质量分数.（要步骤）2.不用其他试剂鉴别顺序是HCL.Ca(OH)2,Na2CO3,NaCL,石 求八下物理书观后感答得好追加50分 CO2+Ca（OH）2→CaCO3↓H2O,此公式中的那个向下的箭头是什么意思?急求~!答得好再给分! The story of monkey king的英语作文谢谢了答得好给追分 英语翻译答得好给10分. 英语翻译如果答得好另加分 答得好的追30分 答得好的给分 急求有关月亮的想象作文答得好,给你50分!火速,先到先得 一道初三数学题（答得好可得50分!）请看这道题的第（3）小问,请问为什么.要求：答得好可得50分. 画线提问 （答得好再加分）The boy in white is Tom.(画线提问) 画线部分：in white 美国概况部分问题~英文回答~每题不超过十个句子~答得好可以加50分~1.What is the cause of the American Civil War?2.What are the two characteristics of the U.S.Constitution?3.How is the American population distributed?4.Why do A