细节描写的背影200字

It is almost five years______we saw each other last time 为什么是since 不是after 某人站在电动扶梯上,经过t1时间由一楼开到二楼,如果自动扶梯不动,人从一楼沿扶梯走到二楼的时间为t2...某人站在电动扶梯上,经过t1时间由一楼开到二楼,如果自动扶梯不动,人从一楼沿扶梯 某人站在自动扶梯上,经过t1时间从一楼到二楼,如果自动扶梯不动,人沿着扶梯从一楼到二楼的时间为t2现使自动扶梯正常运动,人也保持原有速度沿扶梯向上走,则人从一楼到二楼的时间为多少? 某人站在自动扶梯上,经t1时间从一楼升到二楼,如果自动扶梯不动,人沿着扶梯从一楼走到二楼的时间为t2,现使扶梯正常运动,人也保持原有的速度沿扶梯向上走,则人从一楼到二楼的时间是 They （not come）back yet.I think they will comThey （not come）back yet.I think they will come back in an hour. they will come back at ten o'clock.同义句为什么是They won't come back until ten o'clock. 英汉互译：他们将在几天后回来.They will come back (四空)英汉互译：他们将在几天后回来.They will come back (四空) days. It’s many years since I saw you last time and I _________ you at all.A.don’t recognize B.hadn’t recognizedC.haven’t recognized D.didn’t recognize说明原因 It's 3 years since I saw him last time.能不能换成it was... Time__(fly).Two years___(pass)since i saw him last time. Time____(fly).Two years_____(passed) since I saw him last time 按照不同等级的分类单位对生物进行分类,不但可以满足人们的（ ）和（ ）的需要,而且在一定程度上反映了生物的（ ） 科学家根据生物之间的相似度,将生物逐级分为7个等级,其中最基本的分类单位是A：界B：门C：属D：种 less 的用法 和 less 后面加什么词 紧急 do you think he will come back by noon?你认为他会在中午前回来吗?为什么要用by noon ,而不是at noon 请问这个数字是什么字体, 谁这个数字是什么字体?300 600 测得土壤PH约为5 要改善土壤选用的物质是? Because we are beat friends always Really want to have a long vacation,to be a journey forget everything! so tired,i wanna have a long vacation 怎么翻译 9.Good to see you again.It”s almost three years___we met last time.A.until B.before C.while D.9.Good to see you again.It”s almost three years___we met last time.A.until B.before C.while D.since （我选D）要理由. .Good to see you again.It”s almost three years___we met last time.A.until B.before C.while D.9.Good to see you again.It”s almost three years___we met last time.A.until B.before C.while D.since want to have a long It's almost 3 years ____ we met last time .A.until B.before C.while D.sincesince不是后面用时间点是,前面用现在完成时吗?这是也不是现在完成时啊,麻烦详解一下since的几个常用的用法 I real want to show it.句子改错A.I B.real C.want to She ____(real)want to have a brother____(like)John 最好是过程说清楚一点 求一个关于国庆的周记（700字）急! 任意区在哪里说清楚点?拜托各位大神 我要造句和仿写造句:茄子 坚强 汲水 皮开肉绽 痴想仿写：每个人都拥有财富,知识是财富它能增长智慧也能美化心灵.___________________,______________________________.挫折是财富,它能积累经验也能磨 造句,仿写（急,( )的春天是（ ）的季节,（ ）的夏天是（ ）的季节,（ ）的求天是（ ）的季节,（ ）的冬天是（ ）的季节以奉献为话题,写一句排比句用“不管……还是…… 希望 后来”写一