有一种含有碳酸钙与氧化钙的混合物，测得其中钙元素质量分数为50％．取该混合物16g经高温煅烧后，将剩

怎样理解上风向和下风向? She doresn't eat unhealthy food.(改为同义句) 为什么职业高中没有化学物理生物 in which country is the leaning tower of pisa?it's in 磺化木质素是什么 Tom wants to know what the living things___under the deep seaA likes Bis like Care like Dlike 以后金刚石的价格会不会下跌啊?现在的科技完全造得出人造金刚石,而且硬度,耐热性和稳定性也可以超越天然的金刚石. our country get _____ and _____(beautiful) my mother is not used to the life in the noisy city and insists on__to work in the countyrside.A sendingB sentC being sentD send 本兮-海盟山誓亦会分开 的歌词谁知道?3Q 海盟山誓总是赊,我想知道这句话的意义是什么? 最好的煤碳是什么? 有谁知道海盟视频会议怎么样工程商给我推荐南京海盟视频会议,说他们做了很多部队的项目,还有好多地方政府部队,真的假的啊, If I eat junk food every day,（ ）it( )a big difference to my health? 7.Shirley used to live in the countryside.She ___________ there for twenty years,but nowshe is used to the city life.(live)说明为什么 sharon ___in a big city for many years,but she is now content to live in th countryside A.lived B.was living C.has lived D.had lived she used to call on her grandma ___when she lived in the countryside.A another B the other day C every other day [全都要有分析!]2 ,I’d like ___cup of tea, pease. A other B the other C others D another3,I want __eggs.I have eaten too much.A no I （ ）eat junk food.l spent lots of money（ ）fried fooda.am used to ；on b.used to 或是别的答案 Some children spend lots of money on junk food.(保持句意不变)Some children ___lots of money ___ junk food. 使用某装置进行实验时,将滴管中的物质挤入烧瓶中,然后打开止水夹,可以观察到烧瓶内产生美丽的喷泉.你推测烧瓶中的物质可能是什么? I eat ____ food every day,A a lots of B lots of C many D lot of 请问电压力锅烧水安全吗,新买了电压力锅,想先清洁一下,烧一锅水先看看,不止安全否? 硫酸亚铁和氯化亚铁哪个一个便宜些（分析纯）,在保存上有啥优缺点?含量要在99%以上。 假如你生活在1世纪的中国明朝并随郑和的船队七下西洋,请回答与之相隔半个多世纪航海史上发生了什么重大事件 与之相比谁对世界贡献大为什么? 你认为郑和和船队七下西洋,必需具备那些条件? 藏传佛教 藏传佛教的问题送藏族人藏传佛像照片会很高兴 如果送汉传佛教像 他们也喜欢吗有没相通的 Cindy is good at drawing改为一般疑问句 li lei is good at maths.(用english构成选择疑问句） ___ ___ __good at maths ___ ___? Li Yan is good at ( ) (skateLi Yan is good at ( ) (skate). 关于BERLIN的名胜 要英语的~ 什么是三角形等腰线