氟化氢是弱酸

began后跟doing的形式还是to do 不定式 We all made him _____ head of our class .A.the B.a C.one D./ 此时此刻 我耳边又回响着 我眼前又浮现出 仿写此时此刻,我耳边又回响着（ ）；我眼前又浮现出（ ）…… 造句：此时此刻,我耳边又回响着---------------；我眼前又浮现出----------------------------. 此时此刻,我耳边又回响着.我眼前又浮现出.造句 此时此刻,我耳边又回响这老师的淳淳教导,我眼前又浮现出（ ）. summer对应词 summer同类词 英语中people一词是单数还是复数,在与“speak"搭配时需不需要加s? 英语 people是复数还是单数,the people is hard 这句对吗 小学古诗背诵一览表 什么叫 I am feeling Love for you? 别人对你说这话什么意思? I see two elephants over there.(改为一般疑问句) 道家认为:天下柔者莫过于水,而能攻坚者又莫胜于水.水蕴含着深厚的哲学意味.试从不同的角度思考水,并选择其中一个角度写一篇议论文. 英语15.If you don’t take away all your things15.If you don’t take away all your things from the desk, there won’t be enough _______ for my stationery.a.area b.place c.room d.surface为什么 小学数学知识重点有哪些 What do you think of advertisement要2到3分钟的free talk,谢谢了各位,急求啊.急求是口语考试的哦 一道英语选择 Who __at the meeting yesterday and what ___he ____at the meetingA said,does,say B spoke,did,speak C says,did,say D spoke,did,say Who will give us a s___ at the meeting? the driver will be stopped at once if he or she is found ___over the limit speed.1.to drive2.driving 3.driven 怎么选、为什么 he found the lost child ____ ___ ___ ___（在……的帮助下）the policeman. 道家认为 天下柔者莫过于水 而能攻坚者又莫胜于水.水蕴含着深厚的哲学意味. 作文题目：道家认为,天下柔者莫过于水,而能攻坚者又莫胜于水.水蕴含着深厚的哲学意味.试从不同的角度思考水,并选择其中一个角度写一篇议论文. （）——What are you doing,Mum?------______.A.I'm running.B.I'm runing.C.I'm run. my father is interested in photography为什么不用in the my father is researching the spread of aids,and he is _in his presentation of experiments.空格处填meticulous还是meticulously? 道家认为,天下柔者莫过于水,而能攻者又莫胜于水.水蕴涵着丰富的哲学意味.试从不同的角度思考水我想以水是万物之源 Miss white is very kind的上半句? tall pretty is miss white and怎么连英语 求BBC.英语发展史（The.Adventure.Of.English）的字幕求以下电影字幕1.[BBC.英语发展史].01.The.Adventure.Of.English.[History.Int.channel].avi2.[BBC.英语发展史].02.The.Adventure.Of.English.[History.Int.channel].avi 3.[BBC.英语 求the duty of genius天才之为责任的译文电子书!不管是TXT PDF 还是EPUB的都可以!是中文的电子书哦! 道家认为天下柔者莫过于水而能攻坚者莫胜于水.要写议论文可以从那几个角度去想?