在液压系统中,压力和流量的关系

has seen与has been seen has been 和has be有什么区别 ...has been seen as...这个句型怎么用? Let me ___ the new student to the classroom.单项选择A take B takes C to take The new student is inA Class 2 B Class sceond C 2 Class D class 2 16SrDNA一般位于染色体的什么位置 still others think it should be seen by moon light句子中其他都能懂,seen by怎么解释, It＿to be seen who will be the victor in the contest.A.parking B.where parking C.to park D.where to park 请教,这个句子有语法问题吗?谢谢!The reason why I am obliged to you for your kindness is that you provided me with fuel in snowy weather. We shall see,In this bliss,We cannot feel fear or dread翻译成中文 . 请问“That'll be five dollars.”怎么翻译? They'll be back()five o'clockin还是after还是later college success made HIGH的最高级是什么英语最高级什么时候加MORE,什么时候加ER those are my erasers 改为同义句 有没有make sb of doing sth 或make to do sth 都什么?大神具体解释一下最好给一个例句,谢谢. 我还想问how many articles have you writen recenty?其中have 为什么不是had?陈述句应该变had written吗?不是现在分词? high的最高级怎么拼写? 在句子中 什么时候用比较级和最高级 比如:当句子中有the one of的时候形容词要用最高级 do you want to remove the whole archeive Do you want to completely remove Oblivion from your system什么意思? 一些词语的近反义词都是什么?近义词：偎依—— 漆黑—— 和谐——反义词：慈祥—— 耐心—— 可怕——这些词语的近反义词都是什么? 怎么分离 16SrRNA上的蛋白质?急...请问16SrRNA上的蛋白质怎么分离?...可不可以再详细一点.我是个大三的学生,想自己设计个实验....急.比如蛋白质分离出来之后,其中的21种S蛋白怎么具体分离开. 唯见长江天际流,上一句是什么 可以是ChangJiang is the first longest rivers in China Everyone ( )hard( )English.怎么填, 用不可思议的两种意思造不同意思的句子 细菌16SrRNA序列全长通用引物是什么?有好多个版本, 用,不可思议,建句 What's the meaning of "9 out of 20" 用“不可思议”写两句意思截然不同的话： What's the English meaning of "let the cat out of the bag"? 把下列句子变成一般疑问句,在变否定句.第一：i am listening to music.第二：mike is astudent.第三：They are in the zoo.第四：There are some flowers in the vase.第五：This is my sister.