物体只有受到力作用时

soccer ball和ball of soccer意思相同吗? α属于第二象限 则sinα乘以secα根号下csc²α-1 等于多少 谁知道China star 是个什么公司 若α是第二象限角 则sinα×secα×根号下 cscα-1的值 Korea Star China连起来是什么意思啊? a new star ( ) China填什么 设θ为第二象限角,则secθ乘以根号下1-sin^2θ为多少 MORGAN怎么读 president obama has said that he gives each of his seven and ten-year-old daughters just a dollar a week for their chores,such as setting the table,washing dishes,and cleaning up their play area and bedroom.people have different opinions about paying 英语翻译翻译:1 每周我哥哥至少踢两次足球my brother plays soccer____ ____twice a week2 你明天有空吗______you____tomorrow? 用与其……不如…造句! 用 与其...不如...造句记一次野外活动“六.一”儿童节那天,大人们都去上班了,我们两个小孩,在家里无所事事,想出了一件事：去野外——黎都公园玩.我们收拾好东西,便出发了.我带着些旧报 the underlying assumption that.怎么翻译? 翻译：“the familiar argument that the costs outweigh the benefits” Thomas Edison had over 1,000 inventions during his lifetime,most of__changed the worldA.who B.which C.whom 选什么为什么 急,选择适当的方法表示下列集合：由方程式X2-9=0的所有实数根组合的集合?急,选择适当的方法表示下列集合:不等式4x-5 baseball .the .under .is .the .desk .连词成句 英语翻译they had been misled about the true value of facebook when the deal was signed My little brother is afraid _____at night. A.to going out B.going out 断臂山的插曲“the maker makes"怎么翻译? 英语翻译如题! my notebooks are under the chair 改否定 The woman makes a mistake翻译成中文 请问《断臂山》插曲“the maker makes"的歌词是什么? The maker What is the difference between the terms “entity” and “equity” as used in accounting? Evaluate solutions to the trade-off between equity and efficiency in China’s economic development请帮我想3个solution：1.short-term solution?2.medium-term solution?3.long-term solution?请用英语或者中文回答啊，不是要翻译啊~ 已知tan^2α+cot^2α+sec^2α+csc^2α=7,则sinαcosα The apples are.（under.the chair）对括号部分提问 Activation email has been sent to:zhangjun@163.com是什么意思拜托了各位 谢谢 =∫dx/(2cos^2(x/2)+1)=∫sec^(x/2)dx/(2+sec^2(x/2))怎么出来的?=∫dx/(2cos^2(x/2)+1)=∫sec^(x/2)dx/(2+sec^2(x/2))求详细流程,我知识点. I often buy some books at the b_____.空里填什么