两层有3个正方形，三层有6个正方形，四层有10个正方形。55层有多少个正方形

I must - - - - - - - this:it is a secret it is a secret 符合语法吗 为什么warm 温暖的 它的反义词会是 cool 凉爽的意思呢.大家的纸卷思维不是应该是温暖的对应的是冷的吗?虽然我知道hot 的反义词是cold.只是不大明白,为什么warm的反义词会是cool、 warm的反义词 warm的反义词是什么 1.（ ）are you?答：Ah.,it's a secret. 4.We have done things we ought not to have done and_____ undone things we ought to have done.A.left B.leave C.will leave D.leaving 选一个 becanse of you ost of things you have We have done thing we ought not to have done and___undone things we ought to have done.A.left B.leave C.will leave D.leaving 请问是have not only done ...but also done ...还是 have not only done ...but also have done ... keep it secret ,请问secret是什么词性,以及这句话的结构. keep it a secret.双宾keep it as a secret好想也对,把它当做一个秘密保守.我想知道什么时候用双宾,什么时候加介词.请回答详细一点 keep it a secret保密keep it a secret.为什么要加it?直接keep a secret不就行了? keep it secret与keep secret的区别 you must keep it a secretyou must keep a secret 这个句子对吗? 英语翻译谁可以用英语翻译这句话啊` 一直等待的英语是什么~谢谢你们简单点~我只想知道英语 一直等待 的英语怎么写我在等待某个女孩···要简写就行 have they lot a there fun of 连词成句 I have already done (most of my jobs.)划线提问 Have you done it yet?3问3答 I have‘t done it yet.I’ve already done it.【yes,I have done it】现在完成时句 l have already done(my homework)括号内提问 i have done my homework already同义句 i__ __ my homework___ freeze,froze,freezing,frozen的区别如题,最好再分别列句,越通俗易懂越好 i will freeze 与 i'm freezing有什么区别 most people don't like ＿weather. A.freeze B.freezing C.frozen D.froze as soon as the definition will be frozen 怎么翻译? 英语翻译 It's freezing cold帮我分析下 freezing做啥成分?那COLD呢? 英语翻译Hey baby where're you goingI really can’t stay – Baby it’s cold outsideI’ve got to go away – Baby it’s cold outsideThis evening has been – Been hoping that you’d drop inSo very nice – I’ll hold your hands,they’re jus 英语翻译It was cold outside.Peter wanted to buy a jacket for himself.He went into some shops and then he found a store which had a sign outside,“Second-hand clothes bought and sold.” He was carrying an old jacket and asked the owner of the st you work yonug do other like people to with连词成句