草坪学

写一篇意向以“月”的古诗议论文,600~700要结合古诗 在一个月内每天练习一篇议论文,有谁有更好的 提高议论文写作的办法 介绍 给我啊不练 考试也行啊 专门引用月诗句的作文 每段开头用月诗句,抒情性的议论文 人在自动扶梯上不动,随扶梯匀速运动,为什么不受摩擦力如果不受摩擦力,只受重力和支持力不会受力平衡怎么匀速?而乘客和扶梯间有相对运动趋势呀!还有做工情况如何呢 人站在匀速行驶的自动扶梯上,经过t1=20s的时间,恰好到楼上.如果自动扶梯不动,而人匀速沿扶梯上行,则需时间为t2=30s，诺自动扶梯运行，人也沿扶梯匀速上行，则人到达楼上所需的时间为多 9.人站在商场中做匀速运动的自动扶梯上从一楼到二楼需30s,某人走上扶梯后继续匀速往上走,结果从一楼到二楼只用20s,则当扶梯不动,该人以同样的速度从一楼到二楼要a 10sb 50sc 25sd 60s最重要 It _(be)five years since we last saw each other. 英语翻译 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