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0.3x-0.4y/0.6a-b不改变分式的值,把下列各式的分子和分母中各项的系数都化为整数 这题怎麼写?要算式 几道英语单选题,要理由1.The exciting performances attracted the passers-by's_____.A.notice B.attension C.patience D.taste重点区分一下 notice 和attension.2.Neither of the knives can do.This one is________the other.A.no sharper than B.n 英语单选题 帮下忙1、 I( )her to marry meand she agreed.A.askB.askedC.toldD.tell2、– Must we hand inour homework now?– ( ).A.Yes,you willB.Yes,you mustn'tC.No,you needn'tD.No,you mustn't3、The problem is( )bypollution.A.causedB.becauseC 俄罗斯的摩尔曼斯克每年冬季有一段时间太阳总在地平线以下的原因 1.Yesterday,she_______(wear)sunglasses to go to school2.We need to _____(wear) sunglasses in_____(sun)days3,Piease remember_______(close)the door4.Whats the best time _______there.4.Whats the best time _______(go)there.第4条我进行了修改 We were go to school early yesterday.和She was buy a dress last week.是病句吗,怎么改? She went to school yesterday She will go to school tomorrow 改为疑问句,I went to school yesterdayI will go to school tomorrow yesterday she（go）to school on foot怎么填空 67又68分子67÷67 计算 计算氢氧化钙相对分子质量的式子是下列是计算氢氧化钙[Ca（OH）2]相对分子质量的式子,其中正确的是（ ） A ．40+16+1=57 B ．40+2×（16+1）=74 C． 40×16+1=640 D． 40×2×16×1=1280 初一因式分解和不等式,计算题,1.x²-5xy+6y²= y²（3x-2)+(2-3x) (x²+2x)²+2(x²+2x)+12.用代数式填空,使下列等式成立.（1）a²-8a+_______=(a-______)² (2) 4a(a-1)+_________=(2a-1)²(3) (a-2 一环形公路周长是24千米,甲乙两人从公路的同一地点同一时间出发,背向而行,3小时后他们相遇 甲和乙骑自行车在环形公路上从同一地点同时出发后背向而行.当他们第一次相遇时,甲骑了1千米.第二次相遇时,乙一共骑了6千米.环形公路一圈是多少千米? “婴儿连体衣” 用英语怎么说啊 婴儿连体服英文怎么说 求环形周长环形的环宽2cm,外圆周长与内圆周长相差多少 六(1)班期中测试的平均分是92分,若记全班的平均成绩为0分则男女生各自的平均成绩分别是-1.5分和+1.8分,这个班男女生的人数比是多少?算式一元一次方程 或算术 某班期中测试全班的平均成绩为92分,记全班平均成绩为0分,则男女各自平均成绩分别是—1.5分和+1.8分,这个班男女生人数的比是多少?（求算式） Mary -------（乘出租车）to work every day,Yesterday ,she----（乘地铁）and she--_（乘飞机去海南） Yesterday Mary couldn't finish her homework,so she has to go on 什么 it this 不要叫我宝宝,英文怎么讲 物质小孩 英语怎么讲 某班一次数学考试中,平均成绩89分,男生平均87.女生平均92分,求男女之比 （不要二元一次方程） 某班一次数学考试,平均成绩91分,其中男生平均成绩是89分,女生平均成绩92.男女人数比是多少? 因式分解n^3*m^4-49a因式分解½x^4-2y^4 某班一次数学考试,平均成绩是89分,男生的平均成绩是87.5,女生的平均成绩是92分.求这个班男生与女生的人数之比是多少 you shouldn't eat anything for24 hours（改为同义句） you should（ ）（ ）for24hours Sarah had a cold last week.（改为一般疑问句） （ ）Sarah（ ）a cold last week? Erica was ill,so she didn't go to school yesterday（保持原句意思）Erica didn't go to school------ -------- her illness yesterday. The girl was ill.____,she didn’t go to school yesterday.A.In order to B.As soon as C.As a result D.So as to 初三单词拼写 --- Sally didn't go to school yesterday,did she?--- Yes,she did,_____she was ill. 三个鹿念什么拼音