形心公式和质心公式

＂Camera＂请帮忙翻译一下 以 in the new class 为题目写一篇英语作文 My father is____serious,because he never laughs.A.a kind of B.all kinds of C.kinds of D.kind of选什么?理由. There are many boats there.改为一般疑问句 There are feet.(改为疑问句) he has pointed out that the tree is a useful source of income后面的从句为什么是现在时,而不是过去式the villagers have told him that they will not accept the pub 这句后面用的是一般将来时 he has pointed out that the tree is a useful source of income.为什么要用a而不用an?新概念第二册58课中的句子, he has ponted out that tree is a useful source of income译：人们从全国各地纷纷前来参观这棵树 这句话为啥这么说 改成many people has visited the tree 这么说可以吗 useful source of Add an ending to your story,and you'll find it more attractive.(保持原句意思不变)You _________ find your story less attractive ___________ you add an ending to it. It will also add to the burden of your parents.句中to 去掉可以吗? It's your t_____to perform your progam. may be going abroad与may go abroad的区别意思都差不多吗? we may be go abroad请问这句话对吗? 关于be abroad原句是My brother has never been abroad before这里面abroad 是什么词性 书上课文单词表是写adv但是我怎么觉得这里是作adj 呢 因为基本没怎么见过be+adv就结束的句子我自己是英专的.希望有 meals on the on the house ON THE HOUSE He ____his eyes from his desk and then____from his seat.A.rose;raised B.rose;rose C.raised;raised D.raised;rose He said that people who ______ eating green food would be free from illnessHe said that people who _______ eating green food would be free from illness.（carry on）这个空填什么?纠结…… he r ______ quickly from his seat to welcome his guests single ladies The crack ____ (横穿)the house was three days metres long要求用 (cut) be abroad中abroad是什么词性?那为什么可以加在be后面啊? What person or event do you consider to be influential in your life?Please explain your choice.谁能帮我写写谢谢要英文急需 They say that he is leaving soon. ____________he is leaving. go造句,有哪些这样的词组或者应用 Those bottles are empty.单数句是That bottle is empty.还是The bottle is empty.、 on the house on the house 是免费的意思,那么下面这句 excuse me,waitress,I'll have a glass of your house chardonnay.也是要一杯免费的酒吗? 根据句意填空the house has three b____.mine is on the left. Believe your choice forever Mine is nice.(对划线部分提问）（Mine下划线） my three meals a day用初一的普通水平来写就行