如何判断波动的传播方向

求250单词英语作文《my plan for next term》（我的缺点有 做事情很慢,很少跟别人交流,胆子不够大 可以从这几个方面开始写） She's already done her homework.(改为否定句） instead和instead of在用法上的区别 ( )polite that child is!感叹句 A.How B.How a C.What a D.What 并说出原因 英语问题instead 与instead of 有什么区别?用法有什么不同?这里有个例题请大家结合这个,在综合的给我说一说区别与用法,Shall we go there on foot ____ by bus?a.instead b.instead of c.to d.than ]答案为什么选第 哪儿有古汉语语法知识讲义?专门讲古汉语语法知识的 英语翻译 求一篇.英语作文：next year's resolution （应该是差不多高二的决心）300字（算上标点符号） 翻译 我有许多作业要做.I have ____ _____ _____ _____homework to do. 有分!求歌曲right here waiting for you粤语版… The boy was born （ ） May 1987为什么 The boy was born on May 1s t,1982（改为同义句）The____ ____ is May 1st 关于instead of 用法He put the books in the box______________ the shelf.A.instead B.instead of C.instead of on D.instead on选B还是C呢?请帮忙分析下, The boy was born on Saturday 对Saturday 提问 古汉语语法问题什么是古汉语中的无定指代词,请举几个例子,再详细的加以分析 古代汉语语法题论语八章之子适卫辨析“何加焉”的语法关系. 黄帝者,少典之子,姓公孙,名曰轩辕.这句哪个是主语,哪个是谓语,一般文言文的主语都表示什么,谓语都表示什么,由于本人只是初中毕业,对文言文感兴趣,请谅解.还有学文言文语法有什么好处 he is school A student,which his brother never was这里我有两个疑问,1.是主语是student,还是前面那个句子,2.是为什么前面用is,后面用washe is straight A student,which his brother never was she takes as care of you as herself这个句子有错吗?有错,错在哪里? 英语翻译用在外贸英语上. My brother is a student in（ a ）university.为什么不用an呢? move to do和move doing 有什么区别 四、 用适当的词补全对话,每条横线只填一个单词Mary:_When_______ time do you usually get ____up___ o when do you something two times,you do it twice哪里错了 The garden is in the first floor错在哪里? here are my pictures if you like send me your pictures and phone number we can meet 请问老师们：they went home ＿＿ happily.怎么填?为什么? go happily they home 连词成句 They()happily when I ()them were talking,calledtalked,was callingwere talking,was callingwas talking,called请问选哪个 说下理由哦 介词填空,不需要用“|”表示：They always run _ school,but they never run _ home.怎么填?重要的是第二个空.这样填的原因? 2-3 softgels ,twice take two daily什么意思.NIKE的衣服上面看见的.什么意思?