上海思尧

7.下列各组都是生活中常见的物质,其中属于同一类物质的一组是 （ ）A．红磷、医用酒精、纯碱 \x05\x05B．甲烷、加碘盐、石灰水C．食醋、液氧、酱油\x05\x05\x05D．海水、天然气、石油答案为 从物质的分类的角度看,下列物质与二氧化氮、三氧化硫、氧化铝属于同类别的物质是A氢氧化铁 B硫酸铜 C水 D硝酸讲明原因 三氯化铁溶液或硫酸铝钾溶液为什么能做净水剂? 什么是外星人 13号染色体有问题,会有如何表现?我小孩被检查出13号染色体有问题,请问会有什么影响?表现在哪些方面?如发育、智力等. 如果岩石仅发生重结晶作用,但化学成分和矿物成分均无改变,此岩还能否称为变质岩?如题 TOm was wanted to work in the office though he didn't like serving there.这里为什么是was wanted. Jackson _______ to work in the government office though he hated serving there. A.wanted B.was wanting C.is wanted D.was wanted选?为什么 he ( ) to work in govermnet office though he hated serving there.A.wantedB.was wantde.C.had wantde 语法 选择：Jackson_to work in a government office though he hate serving thereJackson _______ to work in the government office though he hated serving there.A.wanted B.was wanting C.is wanted D.was wantedwant指需要怎么了?Did you enjoy last 提问：连续两胎异常,男方染色体1qh+,请问我们能否要小孩, When _______ your parents_______(go）to work every morning? 电池导电金属断了,可以用别的代替吗是这样的,我的手机电池用万能充充时把那个导电的金属丝弄没了一小点,电池就用直充好像充不进了,时有时无,我能不能用械锡棒点锡条补上一点来导电? 请教下为什么用碳做导电剂,而不是导电性能更好的金属或其他材料?还有,对称电池的原理和应用 My parents don't go to work on Saturday and Subda.(改为同义句） My parents_ to work from_to Friday. my parents work very hard in the farm ,they ____get up early in the morning. (1)Leave him in peace he’s trying to work .(2)In the past farmersin Africa hunted wild elephan...(1)Leave him in peace he’s trying to work.(2)In the past farmersin Africa hunted wild elephants without mercy.(3)Our teachers always pay attention to 英语造句take a trip abroad leave me in 帮我写一篇英语作文take a trip He had to leave his ---------/waif/ to work in the countryside I'll leave you in peace 除了字面意思 有没有“我不打扰你了”这方面的意思呀？ 买了一双鞋,凡高的,写着是牛皮PU,牛皮PU是什么? 鞋用PU革耐水解测试标准欧盟的鞋用PU革测试标准是多少 铜铝暖气片厂家什么牌子比较好 He didn't watch TV.He went to the movie.(合并为一句) He went to the movie______of______TV. Everyone went to see the film,______.A.included him B.him including C.including he D.him included这一类题看了直迷糊 Everyone went to see the film,me i__ 请问：我刚回来,英语怎么说?如题. 我想学鬼步舞我现在也正在学一点,可是只会几个动作,而且又不懂怎么连起来,想求个视频能教我一套的鬼步舞,就是一些动作连在一起的.不需要太难,就那些基本动作连在一起就可以了. 几种物质组成的混合物,知道这几种物质中一种元素质量分数,那该怎样求这混合物中另一种元素质量分数?有Na2S,Na2SO4,NA2SO3组成的混合物,钠元素的质量分数为46%,那么氧元素的质量分数是多少? 怎样学鬼步舞最快?我只想学点皮毛 看上去有点效果就行了