out+at+an+open

欧民东1754设向量OM=M向量a,向量ON=N向量b,向量OP=α向量a+β向量b,且向量a与向量b不共线其中M、N、α、β为实数,且MN≠0,若M、P、N三点共线,求α/M+... -
武湛鬼13011733828 ______[答案] m、n表示M、N,p、q表示α、βMN=ON-OM=nb-ma,NP=OP-ON=pa+qb-nb=pa+(q-n)bM、N、P三点共线,即:MN=kNP,即:nb-ma=k(pa+(q-n)b)即:(m+kp)a+(kq-kn-n)b=0,a与b不共线,故:m+kp=0,kq-kn-n=0即:k=-m/p,且:k=n/(q-n),...

欧民东1754...但是还是有点混淆,疑问:我所了解到的是这样看了好多关于such和so的用法和区别,但是还是有点混淆,我所了解到的是这样的:关于such,①such+n,②... -
武湛鬼13011733828 ______[答案] such中的③和so中的③在结构上是一样的,这时候要看形容词,如果形容词是few/little/much/many这时候就用so,如果是其... He has so many friends that he always feels happy. He is very busy. He has so little time that he can't go out with her. They are ...

欧民东1754turn out to be+形容词,名词 to be 可以省略吗 -
武湛鬼13011733828 ______ 不行喔 turn out to be 接adj 或 sth turn out 接sth ,形容词,不能接哎

欧民东1754There are as good fish in the sea as ever came out of it. 后一个as是什么词性? -
武湛鬼13011733828 ______ There are as good fish in the sea as ever came out of it. 后一个as是连词.as...as意为＂和……一样＂,表示同级的比较.其中第一个as为副词,第二个as为连词.其基本结构为:as+ adj./ adv. +as.例如: (1)This film is as interesting as ...

欧民东1754...the other day a.thaour math teacher set such a hard test problem________none of us could work out the other day a.that b.as c.what d.sothe salmon we ate at ... -
武湛鬼13011733828 ______[答案] a.that 考查such a/an+adj.+n.+that.结构,引导结果状语从句.＂如此...的...以至于...＂句意:前几天,我们数学老题出了一道很难的试题,结果我们中没有人能做得来.b.twice as much 考查倍数表达法:倍数+as ...as ...twice...

欧民东1754OA 向量+OB向量 +OP向量=0什么意思 也就是 能得出什么 -
武湛鬼13011733828 ______ OA 向量+OB向量是以OA,OB为邻边的平行四边形经过O的一条对角线OC P在对角线的反向延长线上,且OP长度=OC长度

欧民东1754仁爱英语初二下学期 所有词组+所有语法 -
武湛鬼13011733828 ______ 语法 词组 长度不够 发不了了 先看 1. so+谓语+主语:…也一样. 谓语:be动词/助动词/情态动词 2. so+主语+谓语:的确如此,真的这样. 3. help yourself/yurselves to...请随便吃点... 4. 发现sb做sth : find sb doing sth 5. 不完全同意I don't really ...

欧民东1754represent /present各自的用法?
武湛鬼13011733828 ______ represent vt. 表现,表示,描绘,代表,象征,说明,阐明 present n. 礼物,现在 adj. 当面的,出席的,现在的 v. 赠送,提出,呈现 抱歉、这两个词语没什么联系的,除了拼写

欧民东1754threw it+什么介词 -
武湛鬼13011733828 ______ 可以搭配的介词有: threw it up 放弃,抛出; She began studying medicine, but threw it up after seeing the first operation. 她开始学医,但见习了第一次手术后,便放弃了学医. Instead of throwing the ball to me, he threw it up in the air. 他没有把...

欧民东1754so…that和such…that的区别祥解
武湛鬼13011733828 ______ so...that与such…that的意思和句法作用相同,但是因为so(adv.)和such(adj.)的词类不同,所以so...that和 such...that的句子结构也不同.试比较: so+adj./adv.+that clause(so后跟形容词或副词) such(a/an)+n.+that clause(such后跟名词) 例如: It was ...