如图抛物线y等于负x的平方加bx加c经过点a（负1,0），b（3,0）两点，且与y轴交于点c

can 后面为什么加第三人称单数? can 后面可以跟第三人称单数吗He can read the letter怎么改为一般疑问句？ 为什么在can句式里第三人称单数不用加s? 求小说time and river zhangqianbaimu@sina.com The pollution in the Yangtze River___________________(如此严重以致难以解决) 英语翻译I am sailing,I am sailing,home again 'cross the sea.I am sailing,stormy waters,to be near you,to be free.I am flying,I am flying,like a bird 'cross the sky.I am flying,passing high clouds,to be with you,to be free.Can you hear me,can you 今天虎门下雨吗 虎门的现在是什么?急啊!1 of the six types of media listed above,three ……are to be chosen---largely because of their being representative --tolook at their……请懂这个of……of语法的高手给解释一下 three types of pollution .用英文写出三种污染The first type isthe second type isthe third type isMy suggestions to help reduce pollution are Jane said she __ sending e-mails ___ letters.A preferred,to writing B preferred,to write C prefers,to writing D prefers,to write 为什么第三人称单数加s如果不加s的话会有什么不便的地方么?我知道这是规定,但这项规定不可能平白产生把 GP Basic组合的这个女生叫什么名字从左数第二个 英语直接引语（为疑问句）变间接引语在什么情况下不用变换语序 If you were a tear in my eyes,for fearing of losing you,i won't cry.的意思是什么 If you are a tear in my eye,i won't cry for fear of losing you 的意思中文意思是什么? 英语翻译这是歌词I am sailing,I am sailing home again 'cross the sea.I am sailing stormy waters,to be near you,to be free.I am flying,I am flying like a bird 'cross the sky.I am flying passing high clouds,to be near you,to be free.Can you hear She had a toothache two days ago.对“two days ago"提问 ____ ____she______a toothache? Genius is one percent inspiration and ninety–nine percent perspiration.意思为什么? sailing的歌词.中文和英文. 英语翻译不可能翻译成100摄氏度吧……（那还是人么?）如果理解为100K也没对啊 都零下了…… 5.—He didn't win the race at last,did he?—___________,though he tried to run as fast as he co He had a stomachache a moment ago的同义句同义句转换He had a stomachache a moment ago.He had _____ _____ his stomach ____ ____.You should drink some hot tea with honey.You should drink some hot tea _____ _____honey.Ithink he is a clever boy.I I tried to climb the high( )（山）这里用mountain还是mountains He had a careful looking at it.的同义句 he had a lot of food改同义句 There are some offices on the stadent floor.(改成单数)What is mother?(否定)Where is the box?(否定)This is my classment(复数)She teachers in English.(复数)We offen play with_______(they)（注：这一句是根据后面的形式,写出相 they are orange sweaters 改为单数句 They are orange trees 怎么改为单数句 这是明早作业,IS that your beautiful dress?yes,it is.(改为单数句） This old picture is black and white.（black and white）对括号部分提问 His yellow shoes are behind the door.（behind th 1.They are orange backpacks（改为单数句） 2.My telephone1.They are orange backpacks（改为单数句）2.My telephonet number is 47837548.（画线部分提问）注：47837548是画线部分3.Is that a red car? (改为陈述句）4.Bruce is Mr Green makes a new kite for him的意思. t字母是什么车