here are the pens i have been used in the first year of high school/senior school.
最新问答: 帮个吖 1.一个圆柱形容器的底面半径是4分米,高6分米,里面盛满水,把水倒在棱长是8分米的正方体容器内,水深是多少米?2 不溶于稀硝酸是什么意思 如图所示,两个摩擦传动而无相对滑动的轮子A、B,A为主动轮,半径是Rl,转动的角速度为ω;B轮的半径为R2,C点在B轮上 枫林小区1号楼的实际高度与模型高度的比是600:1现测得模型的高是7厘米这幢楼实际 求老师解答:阅读短文,回答下面问 We met each other ten years ago and then became best friends 7..计算旋转体体积时,参数方程{x=φ(t),y=ψ(t)中,为 在一个等腰三角形内,底边是一条腰长的1.5倍,周长是21,求底边的长度. caco3与 k2co3 ,与co2的反应先后顺序 since her mother had died young,her father took care of his 3,20,5,12可以组成24点吗 看下面漫画《报警》,该同学的做法 不能不孝敬父母的理由 作文 There are many ways in which you can improve your study.But 我国古代数学家张丘建在《算经》一书中提出了“百鸡问题”:鸡翁一值钱五,鸡母一值钱三,鸡雏三值钱一.百钱买百鸡,问鸡翁、鸡 英语翻译:差不多 自然对数e=2.718281828是怎么得出的? 世界上平均海拔最高的高原是什么?它所在的大洲是? 句型转换l usually get up at five o'clock对at five o'clock划线提问Alic 甲、乙、丙、丁四个数的平均数是44,已知甲比乙多22,乙比丙多13,丙和丁相等,这四个数分别是多少?