cost+sb+life
盛蒲刷4568cost him life是什么意思 -
邓闻沸17213634270 ______ cost him life 让他付出生命 双语例句 1 His daring may have cost him his life. 他的冒险可能让他断送了性命.
盛蒲刷4568He was often late for work , and that finally his job. A cost B spent C took D lost -
邓闻沸17213634270 ______ 哦哦,刚刚看错题目了,是that的话,就要用cost了.cost有一个用法,是:“以……为代价”比如,the accident cost his life,这场事故让他付出了生命的代价.所以这里说cost his job,意思就是说,让他付出了丢掉工作的代价.that指代他常常迟到的事实.
盛蒲刷4568初二英语 - What does the sign＂$698＂mean?
邓闻沸17213634270 ______ 英语中购买某物花费多少共有以下几个常用词:1.spend,人作主语,固定用法是sb.spendsomemoneyonsth/(in)buyingsth意思是某人花了多少钱购买某物.Hespent5...
盛蒲刷4568英语中打某人某部位用bit+sb+prep.+部位 具体哪些部位用什么介词? -
邓闻沸17213634270 ______ 英语中身体部位名词前的介词使用总结 英语中身体部位名词前的介词,有些与汉语是相同的,但有些与汉语却截然不同.下面列举一些常见的用在身体部位名词前的介词. 1. in:表示在身体部位内部用in,这是较理解的,但在英语中,涉及身体...
盛蒲刷4568九年级上册英语unit1中3a所涉及的所有语法笔记 -
邓闻沸17213634270 ______[答案] 1.spend,cost,pay,take:spend on sth;spend in dong;sth cost ab money注意:cost的三种形式都是cost;It take ab+时间+to do;pay ab money for 2.区分the other,another,other,others,the others the other:两者范围内特指另一个;another:三者或三者以上...
盛蒲刷4568这题怎么理解?选啥? 71.That moment's stop - __ - the U.S.its lead. -
邓闻沸17213634270 ______[选项] A. cost B. lost C. caused D. missed 为什么 句意?
盛蒲刷4568...1.设a平方+b平方=1,则a+b得最小值是?2.Rt△ABC的面积是8cm平方,则此三角形周长的最小值是?3.若a,b,c>0 且a平凡+2ab+2ac+4bc=12,则a+b+c得... -
邓闻沸17213634270 ______[答案] 1、解依题意 得设a=cost,b=sint则 a+b=cost+sint=√2sin(45•+t) 所以a+b最小值 为-√2 2、设直角边 为 a,b则 ab=16 cc=aa+bb>=2ab=32即c>=4√2 (a+b)>=2√ab=8,a+b+c>=8+4√2 3、a平凡+2ab+2ac+4bc=(a+b)(a+b)-(b-c)(b-c)+2(a+b)c+cc=(a+2b)...
盛蒲刷4568已知sint+cost=1,设s=cost+isint,求f(s)=1+s+s2+…sn. -
邓闻沸17213634270 ______[答案] sint+cost=1 ∴(sint+cost)2=1+2sint•cost=1 ∴2sint•cost=sin2t=0 则cost=0,sint=1或cost=1,sint=0, 当cost=0,sint=1时,s=cost+isint=i 则f(s)=1+s+s2+…sn= 1+i,n=4k+1i,n=4k+20,n=4k+31,n=4(k+1)(k∈N+) 当cost=1,sint=0时,s=cost+isint=1 则f(s)=...
盛蒲刷4568平面向量满足(a +b)(2a +b)= - 4,a=2,b=4,求证向量a和b的夹角为120度 -
邓闻沸17213634270 ______ 平面向量满足(a +b)•(2a +b)=-4,∣a∣=2,∣b∣=4,求证向量a和b的夹角为120度解:设a=(2,0),b=(4cost,4sint);那么a+b=(2+4cost,4sint); 2a+b=(4+4cost,4sint);故(a +b)•(2a +b)=(2+4cost)(4+4cost)+16sin²t=8+24cost+16cos²t+16sin²t=24+24cost=-4,故cost=-28/24<-1,无解.【题目是我写的那样吗?如果是,则题有错!】
盛蒲刷4568make sb+形容词 make sb do sth 中,“do”用动词原形make sb+形容词 中,“形容词”也用形容词原级吗? -
邓闻沸17213634270 ______[答案] make sb+形容词 后面可以跟形容词原级或则比较级,这要看句子的情况了 make it +adj /n + (for sb) to do sth / that cl- / wh – 例如:He made it interesting for us to learn. 还有make me happy等 make后也可以跟形容词比较级 例如:make something ...