x三次方减y三次方

Can you loosen this screw?Can you loose this screw?这两个句子对吗? Can you loose this screw?这个句子对吗?为什么? speak to each other politely.speak后必须加to吗? They _____ speak to each other one year ago.用could,can的相应形式填空 let me see 是什么意思啊?是让我想想?还是让我看看啊?~ let me see 与let's My father used to be mad at me.But now he is p_ith me? To finish the work in an hour is impossble.（同义句转换）（ ） （ ）to finish the work in an huor. Let me see.是什么意思? A and B should coordinate with each other还是should be coordinate with each other?那句话正确? on the whole 和in a word 有什么区别? i go to the park and playthe seesaw.改为过去式 Ling ling went to the park yesterdoy? 改过去式 和回答 百慕大位于哪个地方? 中国的百慕大三角地带在哪? 글쎄是什么意思,看翻译的意思是“是啊”.但是我怎么总感觉有英文let me see的意思? 这里的be mean Sam :If you are too nice to her,then she won't like you either.Robert :But I like her.How can I be mean to her? mean to do mean to和mean to do分别在什么情况下才用”You should have thanked her before you left""I meant to ,but when i was leaving i couldn't find her anywhere:这里为什么不加do？ mean to be的含义在M2M的歌曲《girl in your dreams》中有句：You said,we are mean to be,歌词里把它翻译成了“我们要认真”,但是我查了很多字典,都没说mean有这种含义,故,求正解 LET IT BE怎么样 As no pumas had been reportedmissing from any zoo in thecountry分析语法As no pumas had been reportedmissing from any zoo in thecountry有人说missing是形容词,有人说是主补,到底是什么呢?如果是主补,还原成主动语态是什 你喜欢在海上旅行还是陆地上旅行?Do you like to travle__________ __________or________ ________? Do you like to______ _______ _______ a _______ ________ (去参加学校旅行)?There are about15 students in __________ ___________ (在每一个班).We have a biglibrary ______ _______ _______ ______ books (有着许多有用的书).We only have___ 你在周末还喜欢做些什么?————————do you like to do——? 你还喜欢做什么事情?你还喜欢做什么事情：What else do you like to do 老师把to do 划出来了 The look are comfortable In Which Ways Do You Like to Travel?你喜欢哪种旅行方式?Manypeople like traveling by plane,but I don’t like it because an airport isusually far from the city.I have to get there early and wait for hours for theplane to take off and it is of 鄱阳湖真的是中国版的百慕大吗?那里有什么神秘事件? No kangaroo had been reported missing from any local zoo.这里missing前面可以加that吗 翻译 something wonderful happened.Laughing took away his pain什么东西啊？说清楚点啊 还有没有人回答啊？ 为什么if后面不能or not,whether可以