烽火戏诸侯作品

在平面直角系中,过坐标原点的一条直线与函数f(x)=2/x的图像交于P、Q两点,则线段PQ长的最小值是多少? 现在完成时什么时候加been,什么情况加一种是直接have加过去分词，另一种是have been+过去分词。分不清楚什么时候用have b+ 现在完成时和过去完成时 什么时候要加个been 现在完成时什么时候加been?has been donehas done怎么分别? 现在完成时have后什么时候后面加been? 1.the old man likes to live ina[ ]place.now he is sitting there[ ].(quiet)2.all of them are[ ]to their new[ ].(friend)3.these artists use[ ]things or men as their models.they draw pictures[ ]well.(real)4.the video game machine is so[ ]that all of us 英语翻译我还想补充一下：get in shape 是不是固定用法？ There are _about_ 3,000_ animals in the zoo.对划线部分提问的 开放式循环利用树脂材料具体指的是什么? there is a monkey s in the zoos后面应该写什么？字母？ 树脂板用什么材料做的啊? There.is.much.m_____ in.the.wallet There is a bag on the ground.Whose is it?怎么回答?急用 will what if happen I travel can the at of speed light?（连词成句）heavy ,going,stopped,rain,from,to,school ,us ,（连词成句） I don't know ______ it was that he moved to another city,but life has not been the same since he left.A when Bwhat Chow Dwhere He moved to the city.对 the city提问 They have lived here s ______ he moved to this city.I have e______ seen this film twice,but I haven’t seen that y _____. are fifty in computers threre the computer room.这些词怎么连词成句? -Their family have never moved to another city since they moved to Guangzhou in 1988.-_____ A.Neit同上-Their family have never moved to another city since they moved to Guangzhou in 1988.-_____A.Neither have we B.Neither we haveC.So have we D.So we 英语翻译 blood x blood全部有几本阿?blood x blood繁体版和简体版是一样的吗?唉~ There ___(be)many trees in our school.填什么? 用不饱和树脂做玻璃钢鱼箱为什么会开裂 it's over it u me to think that she lives all alone in that big house,with no one to take care of her首字母填空， She insists that he take his vacation now.在这句活中“take”为什么不能改为“takes”呢? 自行车生锈可以用醋洗吗?如题 There is no need for me和there is no need for me 哪个对啊为什么?为什么用there is no need 而不是there isn't need i don't knnow if there's no need for knives.no there's no need.为什么还要说No Is there any need for all that noise?翻译 谢. 选择题：I don't know any______facts about the Earth. A.fun B.funny C.interesting D.some请解释一下fun和funny的区别.谢谢. animals,talking about,facts,are,fun,the,you,about?这句怎么连词成句?