知道两个速度求平均速度

英语翻译And when the dictators—if the dictators--are ready to make war upon us,they will not wait for an act of war on our part. 英语翻译There is much loose talk of our immunity from immediate and direct invasion from across the seas.Obviously,as long as the British Navy retains its power,no such danger exists. 非谓语中动名词与分词的区别 英语翻译Iridoviruses are large cytoplasmic DNA viruses with an icosahedral morphology [24].The genome is both circularly permutated and terminally redundant,which is a unique feature among eukaryotic virus genomes [2,8].The Iridoviridae family is 英语中动名词可以作谓语吗? 英语翻译Undaunted,he persuaded Mother to cook every fattening food she could think of.He ate before meals,between means and after meals.We laughed and called him "lardo."At the Navy Cadet Office he stepped on the scale—still three pounds to go. 请教英语中动名词的用法什么情况下会用到动名词 麻烦说下 两个动名词放在一起 谓语用什么这是谓语动词用什么啊.getting up early and going to bed early 我填了do 不过老师说是 does 为什么呢 关于非谓语分词的用分词改写下列句子:1.We were delayed by heavy trucks which were being loaded onto the ship.2.He didn't know how to finish the homework.He gave up.3.When he heard the nuews,tears came into his eyes. 六级答题卡尺寸是A4纸张尺寸? 科学（急!） (6 14:22:45)什么物质反应生成ZnSO4（写出所有可能的化学反应方程式） 八年抗日战争最终以中国的胜利而告终.日本帝国主义被迫宣布无条件投降和正式签订投降书的时间分别是? 抗日战争日本是什么时候攻打南京的 抗日战争中日本破坏的南京名胜古迹有哪些 fly的现在分词 解三元一次方程组,谁会阿 抗日战争日本打到中国哪里投降的? 抗日战争,日本人投降是哪天? 图形的平移,旋转,轴对称中,其性质相同的是? 图形的平移.旋转.轴对称,其中相同的性质是什么? 平移,轴对称的性质是什么?旋转呢? 英语翻译如题 在等比数列中,a3a4a5=8,则a2a3a4a5a6的值为? 在等比数列｛an｝中,若已知a3a4a5=8,求a2a8的值 在等比数列｛an｝中,若已知a3a4a5=8,求a2a8的值 在等比数列{an}中,已知a3+a4+a5=13,a3a4a5=27,求an 在等比数列{an}中,a3a4a5=3,a6a7a8=24,则a9a10a11=? 4题的(1),最好用定义来证明这道题 第一题 第一题, sing现在分词 dance现在进行时 sing的现在分词是什么 初二第三单元总结,轴对称,旋转和平移的不同与相同