中国为何需要造航母

有关轻弹簧问题如果一个轻弹簧,一头加4N力,另一头3N.这种情况是否可能存在?如存在,弹簧弹力多少?弹簧伸长量平均吗? 竖直放置的轻弹簧的振动有什么特点 在静止的电梯中放一桶水,把一个轻弹簧的一端连在桶底,另一端连在浸没在水中的质量为m的软木塞上,当电梯由静止开始以加速度a（a小于g）匀加速下降时,轻弹簧的长度怎样变化? Is it all right that I go home early tonight?选择哪个啊?A There's no worry.B Yes,go ahead.C No,not at all.D Is that so? 英国旅游签证哪些材料需要翻译?可以翻译在旁边吗 英语翻译申请英国个人旅游签证所需要的材料中,哪些需要直接提供英文版的材料?哪些需要同时提供中文原版和翻译成英文的版本?关于英文翻译,有没有什么硬性要求? 穷游网 英国旅游签证哪些需要翻译 翻译 I watch TV news ( )about half an hour every night.括号里填介词 ______TV does Betty watch?_____about half an hour. 汉语中知道到底是什么意思?我知道是晓得，明白、理解、会意 的意思，但是从字面上怎么解释？ This w___ suit is very expensive. This is a very expensive machine同义句转换This is( ) ( ) ( ）machine 建议书怎么写? 英语填空 On Saturday evening I often(). A watch a television B watch television C see a television What would you like toWhat would you like to do?求汉语 帮忙看看这个英文名.姓名王振宇、自己想了个名字Zenee、可是不知道怎么读,是读/'zen,i:（就是不知道重读在第一个音节还是第二个音节）如果不是、那发音为/'zen,i:/的名字怎么拼?知道或者有 I often quarrel with my mother over weather I can watch TV after school or n Candy、谁帮我翻译成谐音的中文吧、最好中文的意思,也能和单词本义：甜点,沾点边、、先谢了哈! keep your mobile phone off in class的同义句（两种don`t make the same mistake again I am a student.(对划线部分提问)（a student 划线） 3种提问 I am a student.(对划线部分提问)（a student 划线） _______ _______you? You'd better not use your mobile phone too often.这句话的意思? 以mySunday为题,写一篇小短文,提示词：with,frirnd,go,to,the,zoo,play,games,fly,a,kite,happy, 帮忙看看这个英文名有什么问题本人名”苇林“,入职时比较随意的取了个英文名Welling加上我的姓.工作中使用的非常频繁,账号邮件什么的.感觉似乎有点不妥.我知道Tom Welling,但Welling是作为一 有is he playing football?这个说法吗 he is playing football now这句话有错吗 I can't find my bag anywhere.I think you _it during the concert so it might be in the music hall.用left还是dropped?为什么?这两个选项有什么区别?急用. 图纸的剖面图怎么看 I think I dropped it during the concert so it might still be in the symphony autocad中图纸空间怎样画剖面图和剖面线在哪里设置 _________ he realized it was too late to return home．A.No sooner it grew dark when B.Hardly did it grow dark than C.It was not until dark that D.It was until dark that 根据句意及首字母提示完成单词 1 I can't find my bag .I think I d----- it during the concert.翻议下2 She said you were at your optometrist a-----.3 She's really a----- ,because her keys are lost.4 It's c------ that I study for it becau