如图所示，板的质量为m1，受水平力F作用，沿水平面运动，板与平面间的动摩擦因数为f。在板上放一质量为

they get up very early because they wanted to（）home after breakfast.答案不知道为什么选择leave不选clean,这事阅读里的选择题,不知道是根据翻译选的还是根据语法! 怎么样可以最快练好德语口语? “every every other 数学课的assignment上面写着1-105every other odd, two metres in height=two metres high 一样吗 It's three metres long by two metres wide..这里By是什么意思. 这句子为什么不用非谓语动词作句首?_____ your coat at once. We must hurry.A put on B putting on 填空题, 是不是只有在句子里充当谓语的才叫谓语动词,平常不能说一个动词单词是谓语动词? 一个选择题加三个填空题 I have the intention to love you 英语翻译DI HATIKU TETAP MERINDUI MU,WALAUPUN KITA TAK BERTEMU,NAMUN DI HATIKU MASIH PILU,KERANA AKU MENCINTAI MU~ 不定式具有名词特性吗?什么叫非谓语动词? 非谓语动词是不是只是不能做谓语啊 一样保留了动词的性质特点啊. 瓶邪 sorrow is nothing 求瓶邪文!《sorrow is nothing》!求sorrow is nothing啊! 求《sorrow is nothing》的全文与番外. the following year 为什么year不变复数? all year round year要用复数吗 Arrive early at the cinema （）（）（）（）（确保）getting a seat. have hear of 有这个词组吗,hear的用法是什么 Dogs can hear much better than( A.human B.human being C.humans D.humans being这道题该选什么?并说明下每个选项判断的原因 , 是否存在双重否定的反义疑问句?我想请教个关于反义疑问句问题~I don't think he isn't a good student,____?这个句子双重否定,所以后面的问句部分用isn't合适否?She don't think he isn't a good student,____?虽有 非谓语动词的用法以及部分否定的用法困扰广大人民的问题~或者说：困扰广大不会这两个问题的人民的问题! Her weekend was very interesting(改为疑问句） you had a very good vocation改成反疑问句 How was Mary's weekend?It was not very goodWhat( ) to her() but she has a lot of homework.填空 大西洋周围分布着哪些大洲 大西洋周围的大洲有哪些 大西洋被哪几个大洲包围 怎么唱won't you stand啊?有谁能写个注音版的吗? 好听的歌推荐一点吧,英文的中文的粤语的,类似与won't you stand 静一点的或者比较有特点的都可以.