抛物线y=ax2+bx-3与x轴交于ab两点，与y轴交与点c，且经过点（2，-3a）

单项选择 This kind of books ( ) very popular.1.This kind of books ( ) very popularA.beB.isC.areD.am2.——Excuse me, may I ( ) your English tapes? ——Sure,you can ( ) them for one week.A.borrow,borrowB.borrow,keepC.keep,borro 改错：This kind of camera is very popular but it cost too much This kind of cellphone is very popular,it is in great ____in the cityA quality B progress C production D demand 怎么写?给好评 怎么写,给好评哦 怎么写,给好评!谢谢! 翻译 这条裤子需要洗 this kind of paper_______（feel）very soft 填feel 还是feels 为什么 黄种人智商比白种人高,为何中国人的创造力不如欧美?是教育的原因还是... Would you bought the dictionary if you had had more money yesterday?哪错了? Would you bought the dictionary if you had had more money yesterday?改错 would you bought the dictionary if you had had more money yestoday?错哪了? The green shorts are on sale for 25 dollars.麻烦帮我翻译一下!要准确一点! The green shorts are()sale()$30A on,on B for,for C on,for D for,on 请问为什么How much does this house cost? 这个问句还有一种问法是How much is this house?明明是第三单,肯定用DOES是正确的,但为什么这句还可以用IS呢? how much does this house cost帮我解释下语法does是do的单三形式,在这条句子里怎么理解? 请教 How much does this house cost? 是宾语从句吗?还是什么结构的?如题 把“春天,田野里一片绿色”改为比喻句 含有“手”字的不同意思的成语1.形容敏捷 2.形容聪颖 3.形容高兴 4.形容凶狠 5.形容顺利 6.形容亲密 7.形容惊慌 8.形容医术高明 Now the school things are on sale in the store是说什么意思 单项选择.1.Now the school things___on sale in the store.A.be B.am C.is D.are2.They have rulers___only 2 dollars.A.for B.in C.on D.at 黄种人怎样能和白人长一样听说黄种人去欧洲国家会被嘲笑,怎样才能使黄皮肤,黑头发的黄种人变得和细皮嫩肉,清纯的白种人差不多? 我是拥有黑人和白人血统的黄种人!只有一点!我是汉族人!家在东北!我母亲有点俄罗斯白人血统,只有一点,以无法考究,我父亲有非洲黑人血统,和我妈妈一样,只有一点,已无法考究!请问我是什 为什么白人与黄种人后代象白人,而黑人与白人后代象白人?这是什么原因!你看美国只要你祖上有黑人你就是黑人,有的人黑火基因只占1/10,也算是黑人? 1、Please tell me how much the book spend.2、How much money do you cost for this bike?改错. 改错 ,How much does this bike you cost How much do you cost this bike?How much does this bike you cost How much this bike do you cost? 带有反义词的词最好有2组 含有“心”的成语褒义和贬义 含心的成语 含有心的成语有哪些 含：心的成语含心字的所有成语就行、谢谢全部啊 大蝈蝈! 带有反义词的词语有什么要词语:比如:昼夜,没有,来回.