登高作业等级划分

在直角坐标系xoy中,点A的坐标为（1,根号3）,求角∠AOx的角平分线所在直线的方程 I (have finished) my homework now.选择题I _______ my homework now.A.finishB.finishedC.have finishedD.had finished正确答案C为什么?B为什么不对?now在这里应该用什么时态啊? I have finished my homework now这句话语法分析I have finished my homework now 这句话不是现在完成时,因为有now的出现,而且finish不是可持续性的动做,我这么说对吗?那这句话的时态是一般现代时吗?其中have 平面直角坐标系中有点（3,4）,以点A为圆心,5为R画圆,在同一坐标系中,直线y=-x与圆A的位置关系是帮我说清楚点.最好有图, Don't fall ____,Tom.What's the matter(sleep) Fall,just fall,don't be afride. 116.Long time no see!好久不见!117.No pain,no gain． 不劳无获.118.Well,it depends.噢,这得看情况.119.We're all for it． 我们全都同意.120.What a good deal!真便宜!121.What should I do?我该怎么办?122.You asked for it!你自 I have finished my homework for two hours/I have joined the army since 2005/I have arrived in London for two days.哪里错了,请告知, i finished my homework two hours ago.=i ( ) ( )my homework ( )two hoursfinish是不延续性动词，能这样表达吗？ 用how long对i finished my homework two hours ago中的two hours ago提问 LIght music can help us fall _____ quickly.(sleep) The light music made me fall ________(sleep)quickly. I was so exciting that I couldn't fall____________(sleep)求解答还有：一 I lice on the ___________(twelve)floor of the building.二 The teacher told us that the earth _______(go)around the sun all the time.三 four()____ Russia()_____ draw()___ I __my homework ,mom?Really?When did you finish it?A finished B have finished C had finished请给出原因 还有,请问finish 是延续性动词还是非延续性动词,有完成时吗? when i have finished it.疑问这是是什么时态? How much did you ____for the new cell phone?A pay b spend C cost d take 请附带原因 How much did you( ) the mobile phone?A,cost B,spent C,pay,for D,take写出原因 I don't belive you.she told him that___.I think you are lying.she said that___. whoever told you -----was lying.为什么填that 而不填which? ____ told you that was lying.[A]who [B]whoever并说明原因谢谢 Those who told you that were lying.Whoever told you that was lying.两句话都对吗? 文言文《晋书 谢鲲传》翻译求大神帮助 文言文《晋书．恒伊传》的译文 英语翻译余众弃甲宵遁,闻风声鹤唳,皆以为王师已至,草行露宿,重以饥冻,死者十七八 《晋书 王浑传》文言文翻译 那条黑色的裤子是二十美元吧?翻译 在比例尺为1:38000的南京交通游览图上,下列线段的实际长度成比例的是A.2cm 3cm 4cm 1cm. B1.5cm 2.6cm 4.5cm 5.5cmC.1.1cm 2.2cm 3.3cm 4.4cm D.1cm 2cm 2cm 4cm 在图书馆买的南京交通旅游地图的比例尺是多少啊就是在外面报刊亭买的那种旅游地图的比例尺是多少啊 上面怎么没有啊 有谁知道的帮帮忙啊 , 在比例尺是1:38000的黄浦江交通游览图上,某隧道长约7cm,它的实际长度约为. i often get into trouble when i study english. 这句话对吗? 填空 ：I often study English by making f-------- the population of tianjin is smaller than ______ of shanghai .1.it 2.that 3.this 4./