拼音标声调的规则口诀

病毒主要是由蛋白质和核酸构成,根据什么的不同可以分为什么病毒和什么病毒 有关蛋白质和核酸元素组成和结构有关蛋白质和核酸元素组成和结构积分不在多 ,贵在诚意,小弟再次跪求 所有病毒都是由蛋白质和核酸组成的吗? 英语选择题关于has gone has been--- __ Peter__ to Japan yet?--- yes.He ___ there twice.a.did,go,has gone b.has,gone,has beenc.has,been,has beend.has,gone,went为什么不能选b? There ____ some milk ,two eggs and a few cakes on the table.A is B have 为什么? the milk (taste)sour now.it has gone bad.这里的taste应该用什么形式?说下理由 英语作业选择题：There is____milk in the cup. It's____hot.A. a little a bit B. a bit a little C. a little bit a bit of D. a bit a bit of 选哪个,为什么?麻烦给出详细的解释.谢谢! all the milk has gone sour.这里的have为什么要用第三人称单数?不可数名词用第三人称单数吗? What is the poster——?What things are there——Earth?Some plants live ——the water.It is important for us to protect the Earth——our future.What is the weather——in different places on Earth? what would happen if there were no water on the earth 句型怎么转换 英语翻译国家名字有中英文并按大洲分类,有电话区号最好 请问谁知道这些国家的英语全名?（详细的全称）还有当地的称呼!例如：中国 china chinese 美利坚合众国（美国）?英国?法国?德国?日本?希腊?澳大利亚? There is a lot of water in the bottle对a lot of 提问 There are a lot of water on the earth But only a small part is that people can drink water People翻译 There is a lot of water in the cup可以说成The cup have a lot of water吗?如果不可以,请告诉我为什么吖.. beautiful求一首英文歌,男生唱的,歌词里有so beautiful so beautiful这歌的MV里 有一个白衣男生坐在海岸边,拿出东西然后跳下去了 It is strange that she( )todayA.will be absent B.is absent C.should be absent D.was absent该题正确答案应选C,说明其他几项为什么不对, It is strange that she should have done it.should have done 是应该表示应该做而没做吗?这句话,真奇怪,她竟会干出这种事来.这句话,我无法理解,请高手帮我讲讲如果英语知识很扎实,能力很强的话,请再帮 It is strange that she (should) be so rude.怎么会有should省略?还有的是为什么用be!如题. It is strange that she________(give up) her plan. it seemed that she was angry同义句 She [3]angry there`s more water than land .there`s less land than water.翻译 ocean water covers two-thirds of the earth .-----,ocean is larger than land .a that means b that is to say c in addition d however选哪个?一二的区别是 用词组造句（用个词改2个句）1.it'S…that…（强调句）2.…,who…（非限制性定语从句）3.on purpose4.同时含alone,lonely5.…where…play an important…rule（定语从句） 根据句子写词语 谢谢 用这些词语写句子 how do you come here?I come here ____ the bus.A.by B.take C.ride D.on Here _____ the bus.A.come B.come i can fiy a kite here和i can take a bus here的地点指的是?用英文写出答案 ( )--How do you come here?--Icome here________.A.on bus B.on a bus C.in plane D.by a plane 翻译句子 You must always be good as well as look good you look good RT 是漂亮的意思?健康的意思?气色不错？听上去好像是很一般的平价 是这个意思吗