axb与tanx－sinx为等价无穷小

断电延时继电器在它没有通电的时候,它控制的开关是开还是关闭的状态?还有,给它通电是要达到它的跳转时间,还是通一下马上就关掉它也可以自己保持到跳转的时间? There are many trees on ( ) side of the river.a.every B.either C.all D.both 求详解, tom is take some photos 哪里错了 正确的是什么 ___I take some photos in the hall?no,you____A can;needn'tB Must;mustn'tC Could;won'tD May;mustn't选哪个?mustn't是禁止的意思吗? Miss lin willtake some photos inthe park 对划线部分提问 提问take some photos How about _______(take)some photos? They are English books.变一般疑问句 They are books 英语疑问句 many trees are on __sides of the river.A each B both C all D every these are books.改为特殊疑问句怎么改啊!是用these还是用they替换 只年级和中国说法不同吧,如中国初一、二、三, 美国的年级顺序,然后呢?接下来是什么? There are many trees on either side of the street.（同义句转换）There are many tress on ____ ____of the street. These are photo(改为一般疑问句)连词成句:1.gives Jack gold to the mother his2.monster see doesn't the him3.smell I boy little a4.have magic five I beans ( )提问 No,I usually go there with my friend,Mary. 求“元”开头 成语 There are some banana trees ---------the other side of the river.A.in B.at C.on D.of Near the river there are not(some fiower,any flowers,flower,some flowers)什么意思以及答案 二战后美国和德国的军事关系如何?目前是在怎样的一个平台上合作?欧盟国家和美国的军事合作在哪方面? 欧盟的老大是法国还是德国?他们在二战是世仇,现在竟然还能处这么好?是什么原因?国内难道就没有反对势?像我们的仇日那种情绪? liang发音开头的成语有哪些? 否定倒装句的用法 neither引导的倒装句要怎么做,注意什么要怎么做,注意什么 翻译l also went to hainan lsland there are lots of flowers on________sides of the river.这里是填both还是 each呢?最好有详解, they are English books.(改为单数形式) Are there math books?改为单数形式是什么? There are some English books on the desk.改成单数句 swatch手表哪个国家最便宜 翻译：Xu beihong擅长画马． 英语翻译用上be known for neither```nor ```怎么用?什么时候要倒装?比如这句话：她既没有专业技术本领以找个好工作挣钱,也没有父兄可提供资金让她做生意赚钱.要用neither nor 句型该怎么写呢?