歼21战斗机

电势与电势能比较大小时需要带正负号吗? his mother took __care of him in the hospital,so he will return to school very soon A.well B.good 请问华研外语的六级真题答案里面有附有听力原文吗? The workers will finish mending the road_this month.A.in B.on C.by 　　讨教：中国古诗词最伤感的是哪句? be good for 、be good with、 be good to能不能给我讲一下这三个词组的意思和用法 Be good with 有这个词组吗? 1.he asked for a meal and a glass of beer 2. Wha1.he asked for a meal and a glass of beer 2. What barbara Jone offers to her fans is honesty and happiness. 第二句不是主从嘛!offer 后面缺sth 那第一句不也应该是ask sb for sth 少人 All that he asked for was a glass of iced tea=he asked for ___a glass of iced tea. 作文good habit五十~六十字！ Why __(not go) out for __(walk)? 用所给词的正确形式填空. soryy,my girl friend 是什么意思? I'll give the message to him as soon as he __________.A. is returning B. will return C. returns D. returned选C,请帮我分析一下,谢谢! He"ll call me as soon as he____(arrive) in hong kong tomorrow. be good kind to 的用法有一题是这样的：She was always ____kind to the children.A. good B. well C. bad D. funny 答案是A 不知怎么理解.请大家来回答.谢谢! 英语翻译这是阅读理解的名字 海豹用英语怎么说 有四支试管上盖上棉花,放置在37度的恒温箱第一试管里有牛肉汁和盐水第二试管里有牛肉汁和醋第三试管里有煮过的牛肉汁第四试管里有未煮过的牛肉汁（一周后）哪一个试管的微生物最多? FOR ME LITTLE TIME I WILL THINK it is a good habit to wash your h___before dinner.填空 英语翻译请翻译这句话,当然,重点是up to, 在下列四支试管中分别加入一些物质,甲试管：经高温煮沸冷却后的豆浆；乙试管：人体必需的8种氨基酸；丙试管：蛋清和蛋白酶；丁试管：人血液中的红细胞和蒸馏水,则上述四支试管中加 试管移植后可以喝豆浆吗 Be good for ,Be good at与Be good to 的区别 three fifths 是单数还是复数? Class three 是单数还是复数? Two months后谓语用单数还是复数 He goes for a walk after dinner.(同义句） 六年级数学寒假作业全部答案是什么?紫色书皮, 设计人性杨. 谢谢了 高中生物必修2第一章第一节第7页,设计实验程序配紫色花的那道题如何解? 苏丹三染成紫色和蓝色的物质 高中生物必修一32页左上角的图中紫色和蓝色部分 bye my lover!love means having to say you are sorry!