为什么血是红色的

used to和be use to在语法、词性、结构上有什么区别? shanghai is in the east of china.划线划在in the east of china问什么?———— ————shanghai? be used to中的used的词性 英语底子差,如何弥补? 我的英语底子差, 英语底子差,则么补? 改错 简单的初二数学题,速度某种客车车费起步是21km以内2.8元,往后每增加455m车费增加0.5元（不足455m按455m计算）.现从A到B,共支出车费9.8元；如果从A到B,先步行300m然后乘车也是9.8元,求AB中点C到B要 题目都才图里 如图 My grandfather ___ me stories when I was young .A was used to tell B is used to telling C used to tell D used to telling 为什么选D? 总结《西游记》中的主要人物（名字、性格特点）、主要情节 When I was young ,my mother told me a t___ before I went to bed every day. （1）三角形ABC中,角C等于90度,AD是角BAC的角平分线,CD等于一点五,BD等于二点五,求AC.（2）三角形ABC中,角A等于60度,AB等于9厘米,AC6厘米,求BC.请讲讲思路,最好有带图. 帮忙看看这两道初二的数学证明题(1)如图：已知AC平分∠BAD,CE⊥AD,E为垂足,AB+AD=2AE求证：（1）∠B+∠D=180°(2)如图：△ABC中,∠ABC=45° AD⊥BC于D,点E在AD上.且DE=CD,求证BE=AC没分了,帮我看看吧~~~就星 若x^2-y^2=40 x+y=8/5 则x-y=—— （1）某校150名学生参加语文考试,平均成绩是65分,其中及格人数人均77分,不及格人数人均47分,求及格、不及格人数个是多少?（2）甲、乙两人在400米的跑道上练习跑步,如果同时同向而跑,他们 -- Hi,jack ,you look tired .---I am tired,I____he living room all day.-- Hi,jack ,you look tired .---I am tired,I____he living room all day.A.painted B.had painted C.have been painted D.have painted 为什么选C? 11 --You look tired.-----I ___ the living room all daya have been painting b.have painted 3个词写一句话.用珍贵、耽误、翻来覆去写一段话. hi,Tracy,you look tired.i __the living room all day.A painted B had painted C have been painting D have painted空白处填什么选C,表示Tracy还在painting吗? 用带点的词写一句话虽然他已经十四岁了,但个子不高.·· ·用（虽然）（但） hi,tracy,you look tired i am tired--Hi,Tracy,you look tired.--I am tired.I_____the living room all day.A .painted B .had painted C .have been painting D .have painted 为什么? -Hi,Tom,You look tired.-Yes,I__the room all the afternoon.A.paintedB.had paintedC.have paintedD.have been painting为什么选择D 英汉语标点使用差异关于分号的使用差异.在英汉语中分号的使用有什么区别. when he ( )the door ,he found his keys were nowhere.A.would open B.opened C.had opened D.was to open为什么答案选D,为什么不选B,在时间状语从句中,不是可以用过去时表过去将来时吗 would do 和was to open when he ____ the door,he found his keys were nowhere.A.to,by B.when he ____ the door,he found his keys were nowhere.A.to,by B.by,to C.had opened D.was to .将要开的时候,但是would open 是will open的过去式,虽然常 when he ___the door,he found his keys were nowhere.1 would open 2 was to open选择哪一个,及分别说出分别为什么对与错 My friend Henry,with him I studied in the same class,didn’t like studying at school.That’s because he couldn’tgo to high school.He had to return back to his hometown,where his father wished him to learn to manage our smallshop.However,the young When he opened his door,he found everything in the room was g___ 1.We have made more progresses in English study than last term.2.Under the tree was an old armchair the ola man used to sit.3.Nobody who breaks the law can avoid to be punished.All people are equal before the law.4.Remember turning off the lights whe 改错 When I was young,my mother often told me some stories _ her children.这里用of 还是about?是childhood不是children.