凹透镜焦距与眼睛近视转换关系

来帮我检查我立刻给好评 某温度下,一杯饱和的硝酸钾溶液,欲使其溶质的质量分数改变,下列操作可行的是 需要详细解答过程A.加入硝酸钾晶体 B.降低温度 C. 恒温蒸发溶剂 D.升高温度 1．原子核是由质子和 中子 组成的.纳米技术是高新科学技术和工程技术,纳米是很小的长度单位,,若一个分子的直径为 ,则我国科学家制造的纳米碳纤维管的直径是 ,相当于____330000000000___个分 My mather is fine.对fine提问 ( )is( )mother? My mother is (fine).(括号部分提问) ____is____mother? my mother is fine对fine提问 this pair of shoes cost/costs a lot ?this pair of shoes costs a lot ?又为什么是they fit me very well? Do you know how much this costs?其中为什么cost要加s?不是疑问句都要用原型吗? This book_____two yuan .so I two yuan in buying it. A.cost:spend B.costs:spent That's my dictionary.改为一般疑问句并作否定回答 The MP3_too much.he_200 yuan_it.A.spent;spent;on B.cost;spent;on C.paid;paid;for D.paid;cost;in选哪个 另外解释一下为什么选这个 i spent 2000 yuan on the medicine cost 改成cost The boss （ )1000 yuan on his plane ticket.A paid B cost C took D spent 什么叫就划线部分提问?能否给出一个具体方法 就划线部分提问The next night,you will be ready to sleep at an earlier hour.------------------- 就划线部分提问, How much did you ( )for the book?It's five yuan A,buy B,spend C,cost D,pay （ ）1.—How much did you ____ buying the new bike?—Three hundred yuan.A.pay B.cost C.take stickers,much,cost,how,do,the,you? Do you know how much it _____?（填上适当的单词） Yes,100 yuan.书上答案是cost,可以填is吗? How ____did you pay?A:much yuan B:many yuan C:much yuans D:many yuans 对划线部分提问?1.My favourite event is .2.John lives with his parents 3.Tom comes to school in the morning.4.Yuri Gagarin became the first man in space.括号里的部分就划线部分.请在2011年2月2日19时30分之前回答, 同义句 1.I dont have any more of it.2.The g同义句 1.I dont have any more of it.2.The girl is too young,and she can not go to school 如何对划线部分提问 对划线部分提问, 英语对划线部分提问?1.I think roses are the nicest of all the flowers （对划线部分提问）———______ ____do you think are the nicest______ ____? 某商店三月份的价格为每件A元,共销售了B件这种商品,为了促销,商场决定四月份该商品的价格比三月份下降20%,结果销售件数是三月份的2倍 （1）四月份该商品的营业额是多少?（2）四月份该 The coat costs 20 yuan同义句 then coat costs me 100 yuan 同义句i（ ）100 yuan （ ) BUYING THE COAT the coat is 20 yuan 同义句 划线部分提问 给划线部分提问