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sinX+cosX=1/5 sin方x+COS方X=1怎么解RT (1)A城到B城相距240千米,一辆汽车用4时从A城开到B城,这辆汽车的速度是多少?（2）小明妈妈买了5千克苹果共用去12.5元,每千克苹果多少元?（3）某小区的游泳池占地750平方米,宽是25米,长是多少 6-4x-x^2=5/|sin(y/x)cos(y/x)|的解 帮我判断一个句子的类型she talks as if she were an American.这是个宾语从句还是表语从句?怎么判断的?这句话中talk是动词，后面不是应该加宾语从句么？为什么是表语从句呢？ Dave sometimes helps in house at the weekend.怎么改为一般疑问句? It is nine thirty in the morning.阅读答案（英语）It is nine thirty in the morning.Mr.Green and his students are going out on a picnic.They’re now in the park.The children are having a good time.Look,the girls in the beautiful dresses are Su is,six,the,it,morning,in.排序成句子 lt is six thirty in the morning.Ron m_____ get up.He puts up his clothes,but can't f_____ his shoes.He put them under the bed last night.They are not there now.His parents help him look for the shoes.At last,they find both of the shoes a_____ in thei 0度空间没有空气人怎么活呢?能用氧气瓶吗? It takes me twenty minutes ____ _____(驾驶)my car to work it takes me 5 minutes()(完成) the homework.2,When it ()(rain) ,Ineed to take an umbrella.3,I practiced ()(read) English every day last year.4,there ()(be) something on the desk Peter often visits his website （at the weekend）.(对划线句子提问,画线句子是括号) 帮解决一道解方程.9分之8X=6分之1乘51分之16 X+[（X+12）*4/5]=42 麻烦各位解决一道解方程6.5×8-12.4X=51.4解： （怎么做,帮帮忙） 已知函数f（x)=3*x3+2x,求f（a）,f（-a）,f（a）+f(-a）的值? 英语翻译3.He walks home every day,__________?4.Sally rode a bike just now ,___________?限时：2个小时内回答第二个单词 改为shaved 中秋节作文加来历400字,快 sin(1/x)-cos(1/x)/x在这个式子中x趋于0+和0-时,两者值相等吗?为什么》 “图书角”有一些科普书和文艺书,其中文艺书有68本,如果从“图书角”拿出23本科普书,那么剩下的科普书比文艺书多5本.“图书角”原有多少本科普书? Did you watch tv on last weekend?改为一般疑问句 Sanch often watch TV 一般疑问句怎样变 mary often watch tv on saturday对 on saturday提问 丽丽2007年时15岁,2010年爷爷的年龄是丽丽的4倍,爷爷是哪年出生的,今年多少岁? 丽丽今年16岁,爷爷今年岁不满70岁,他的年龄(x岁)比丽丽的年龄的4倍还多,试写出符 丽丽今年16岁,爷爷今年虽不满70岁,他的年龄(x岁)比丽丽的年龄的4倍还多,试写出符合爷爷年龄的不等式组?是不等式组 到底哪里有题目就是 service area sweets 的这篇英语完形,也是2014北京会考的完形原题 若方程组2x+y=1-m,x+2y=2未知数x、y满足x+y大于0,求m的非负整数解 连词成句.I,my,homework,finish,can,first 英语 同义词转换 1.I will go to bed when I finish my homework I _ go to _ I finsh my homework还有decided to buy 可以转换成什么? 如果（m的平方-4）x的二次方+mx-6=0是关于x的一元一次方程,求x的值 It took Sam 20 minutes to get to the park.同义句Sam____20 minutes____to the park.