证明直线与平面平行

近义词组成的成语五什么四什么.千什么百什么.什么钉什么铁.无什么无什么?急.急.急 当k为何值时,不等式2x2+2kx+k/4x2+6x+3 X+2ax－a≥0恒成立,为什么b－4ac≤0 英语翻译越准确越好! 数学：当k为何值时,2x-k/2=2k+3x/3 +1恒成立? I am `t tony.I am Alan How are you spell it? is that her orange?找出三个错Is that her orange?Yes,it is 求初一语文《导学与测评》答案!急啊! you must clean your watch once a year的同义句改为被动语态， you must clean your watch once a year,的句子成分咋画 You must clean the table once a week.( )1.You should finish your homework in time.A.劝告 B.建议 C.责备 D.命令 ( )2.You ought to clean the table once a week.A.劝告 B.建议 C.责备 D.命令 ( )3.You shouldn’t go alone.A.不应该 B.不能 初一语文自主检测答案 区分不规则动词中的过去式和过去分词?不规则动词中的过去式是不是用在过去进行时的,过去分词是不是用在过去完成时?.原型用在（现在式）的?最好举例说明 The girl’s and the boy’s ______ (name ) are Lucy and Tony what is particle model of matter and how does it work? 当哈利遇上莎莉台词,就是how does it work 那里哈利说的那段话 （）（）n（）（）,一个动物单词 以N开头表示动物类的单词有哪些! dinner,home,let ,at ,have,us 连词成句 急! jane is weaker than lucy is.的同义词是什么 Tony is a menmber of the volleyball team.(改为同义词) Tony _____ _____ the volleyball team. 雅思口语的一个句子,怎么改?It's more convenient and the price usually cheaper than some big shopping malls.这句话有语法错误吗?怎么改? 若对任意x+y+3=xy（x>0,y>0）的任意x,y （x+y）^2-a（x+y）+1≥0恒成立 若f(x+1)+f(1-x)=0恒成立,则y=f(x)关于什么对称? 一个字母+ea+一个字母+t是什么单词 he wants to be a ___(cook) so he is going to a_____(cook)school 哲学的基本门类包括那些 请教英语长难句1999 3 With optimism characteristic of all industrialized countries ,we came to accept that everyone is fit to be educated.Computer-education advocates forsake this optimistic notion for a pessimism that betrays their otherwise c 英语长难句求教The Himalayas,which are the world's highest mountains,along with the central Asian mountains of varying heights associated with [them],were formed by.谁能翻译下?我搞不清楚them这里指代什么?Himalayas 还是 central 英语长难句求助Probably,there is one here who has not in the course of the day had occasion to set in motion a complex train of reasoning of the very same king,though differing in degree,as that which a scientific man goes through in tracing th 问个英语长难句Of millions who saw haley's comet in 1986, how many people will live long enough to see it return in the 21th century.谁能给我分析下,将Of millions...,前置这是什么用法? China's law stipulates that the employment of child labor is illegal. Dissatisfied with how many ye我国法律规定,雇佣童工是违法的.不满多少周岁才是童工呢?16周岁还是18? 求这篇的答案Most children with healthy appetites（食欲）are ready to eat almost anything that is offered to them .A child often likes food unless it is badly cooked .The way a meal is cooked and served is most important and an attractively