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关于杠杆的一道题目,.将一根平放在地面上的长铁棒的一端慢慢抬起,另一端搁在地上,再抬起一端的过程中,如果用的力始终跟铁棒垂直,则抬起铁棒的力F将______.(增大or减小还是不变) 一杆秤用一较小质量秤砣代替标准秤砣,质量为标准秤砣的一半,测得某一物体质量读数是3KG,实际是2KG,那么当某一被测物体读数6KG,实际是多少KG?(要有计算过程,感激不尽) 用哪里 哪里 哪里 哪里（4个哪里）都要 造句.哪里( ) 哪里( ） 哪里（ ） 哪里（ ）都（ ） 补充括号里的.哈哈 不好意思 是 都 不是都要 初二杠杆平衡的一道题长2米的轻质杠杆的左端挂一个50牛重的物体,右端挂一个100牛重的物体,如果要使其平衡,则支点应在距右端多少米的地方? 在杠杆平衡条件实验中有一种题目说一个人做了实验结论是动力×动力臂=阻力×阻力臂 问正确吗 一种是多次测量得到普遍规律还有1种是 改变力的方向 我想请问什么情况下是第一种 什么情 It took mary two weeks to prepare for the exam(改为同义句）Mary____two weeks_____ _____for the exam It took Jim weeks to prepare for the exam 改同义句 Jim____two weeks ____ ____for the exam that's a white baseball ,对a white baseball 提问 同意句改写：It took Marry tow weeks to prepare for the exam要翻译对哦 if you want to buy Harry Potter,i should go to the b____.首字母 The meeting is (from 2 o'clock to 5 o'clock)(划线提问） ___ ___ do you want to see,Harry Potter orMonkey King?对不起，打错了，应该是_______ ________ the meeting？ shui he wo liao tian,hao ping wo hao mehahah 我不想 gei wo haoenglish123456789 my first ride on a train的全文翻译 写一篇英语作文My first ride on train 英语翻译Last week,my four year old daughter,Sally,was invited to a children’s party.I decided to take her by train.Sally was very excited because she had never traveled on a train before.She sat near the window and asked questions about everyth 外研社英语必修一 Module3 My first ride on a train 单词听力 急. I（）（）（）（）（已经意识到）that he is a kind man leave的用法leave for 和 leave to,二者有什么区别?请分别举例说明, leave用法leave后加什么介词?最好有解释. leave各种用法leave各种用法leave各种用法leave各种用法v If you put too much salt on our food,it tastes too_____(salt) You put a little too much salt in it If you put too much salt,the food is() 括号里填什么? we also divided our rubbish into the same bags for bottles的翻译 I will leave the book-----it was a.where b.how c.if it _____ now pretty late , we took our things and retired to our room答案选 being .这是一个独立主格? 请高手讲解一下怎么判断的? Can you tell me the_of the novel?Aname Bauthor CCan you tell me the_of the novel?Aname Bauthor Ccharacter Dfeature.我会翻译但是感觉四个选项好像都说得通 Have you read a novel recently?can you tell meHave you read a novel recently?can you tell me something about it.英语回答并翻译. Could you tell me some english-novel/fiction websites?Could you tell me some english-novel/fiction/essay websites that update everyday and are free to visit thanks!