ppm和moll

工程队修一条六百米的公路,修了八天后还剩下一百二十米没修完.工程队平均每天修多少米? 电子秤的M1m2是什么意思? 某项工程由甲单独做需M天,由乙单独做需N天,两人合作4天后,剩下的工程是 某工程甲独做需n天乙独做需m天则两人合作需多少天 小学生女子三年级50米短跑达标,我体重34千克,跑了8.1秒算及格么?可不可以给我一下标准呢?例如：8.7秒是优秀等滴（数学书上看的） 初一英语翻译,我想买一个篮球给我的爸爸. （1+1/2）*（1-1/2）*（1+1/3）*（1-1/3）*.（1+1/9）*（1-1/9） 1+1+1+1+9+3+1+2 刘翔 is very excellent.everyone likes him (so.that.)连成一句 He a very good teacher .Everyone likes him.合并句子 He is ___a good teacher ___ everyone likes him John is very _____ in our calss.Everyone likes him.A.popilar B.clever C.talkative D.hardworking he is a very good teacher. Everyone likes him. 两句合成一句合成为he is _____ a good teacher ______everyone likes him. 如何证明平行线分线段成比例定理?那怎样用相似证明呢？ 工程队修一条600米的公路,修了8天后,还剩下120米没修完,平均每天修多少米?要等量关系式和方程啊,要讲理解. 有一个放大镜,在这个放大镜上看一条线,其长度增加8倍在这个放大镜上看一个角,度数增加多少倍?急,要有算式 补充填空 Andy：Where shall we go tomorrow?I want to have a full day out.Tom :I would like to go tothe cinema.A:Sounds good .I am sure we will e----- the film.Shall we come back for lunch?T:No.What do you think of Sichuan R-------- near our schoo I don't like to eat the same food.I want to have______.A.anying differentB.some differentC.someing differentD.any different he never doubt that he is honest这里为什么用that,不用weather Do you like the book tom give you?It is exactly____I want.为什么填the one不填the one which ___,he is honest.、As he is poorB、Poor is heC、Poor as he isD、Poor as is he讲明原因，+=+ You really don't have the idea______I want to see Tom用how often ,how long ,how soon ,还是how much后面还有一句：It's 5years since we graduated 把你感受最深的一部文学名著推荐给我,请把你感受最深的一部文学名著推荐给我并简要谈谈你推荐的理由, 讲台上有19本新书.英文翻译 这些是我们的新书吗? 是的,我们把她们送到教室去吧. 怎么用英文翻译 给我推荐一本名著!要有推荐理由和一些阅读后的感受!长一点! I c______ him that she was honest he is ____ an honest boy_____all of us love him A so a;that B so;that C such;that D such a;that 用连词改写句子1.we all trust him .tom is an honest man（sunch.that）2.my brother went to bed.the play was over.(not.until) after you talk with him,you____(realize)that he is an honest man ___(honest) is imporant.为什么填honesty 关于球的英文单词,football 网的英文单词是WEB,球的英文单词是BALL,那么网球的英文单词是什么?这个可不是脑筋急转弯