物理期中考试质量分析

下列去括号正确的是() A. 3x+(5-2x)=3x+5+2x B. -(x-6)=-x-6 C.7x-(x+1)=7x-x-1 D. 3(x+8)=3x+8 把1—9填入括号中()()()=1/2X()()()=1/3X()()() distance的意思 distance的英语什么意思 Manhattan distance是怎么定义的? Euclidean distance是什么意思 甲、乙两城之间有长途汽车以固定的速度行驶.如果车速比原定速度每小时快6千米甲、乙、丙三人进行自行车比赛,结果甲比乙早24分钟、乙比丙早6分钟到达终点.又知道甲速度比乙速度每小时 —[—(3x-y)]去括号. 甲、乙两辆汽车同时从相距255千米的两城相对开出,2.5小时后相遇.已知甲、乙两车速度的比是8:9,求两车速各是多少? 甲、乙两城之间有长途汽车以固定速度行驶.如果车速比原定速度每小时快6千米,那么就可以早到20分钟.如果车速比原定速度每小时慢5千米,那么就要迟到24分钟.问甲、乙两城之间的路程是多 各位大哥大姐们,可怜可怜：八年级新目标江西专版英语周报第十一期（2011-2012）的答案谁有啊 谁有八年级上册江西英语周报2011-2012第八期答案?报下急要 英语周报新目标江西专版八年级上册第1-2单元答案,(第3期) around the During the six-day session,Guangzhou CPPCC Committee opened a blog to solicit public opinions around the clock. around the clock 的歌词 一个圆与一个长方形的面积相等,圆的半径是2厘米,长方形的长是4厘米,宽是()厘米 为什么像这个,这个是0/0型的,却可以直接把t=0代进去算.不是说0/0型不能直接把数字代进去,要约分变形或者求导吗?比如lim（x→0） sinx/x Excuse me,( ) can I get to the bus shop? Excuse me,how can I get to the nearest()shop?A.shoesB.shoeC.shoes'D.shoe's 选什么,为什么 Excuse me,how can I get to the nearest supermarket?– _______. Don't________ to do your homework after school.（________ 中填6个字的单词,第5个字母为e） ___your homework after school A.Don't B.Not C.Do D.Does R什么to finishi your homework after school求高人解答 第四大题,化学高手来,急 2009年能看到大面积的流星雨吗? 2009年流星雨在加拿大温哥华能看到吗? Paraphrases1.While I was there,she accidentally knocked a flower pot from her windows.2.My fridend was too afraid to talk to the police.3.I don't konw what to do4.I don't know how to help him.5.Last night I went to New York by plane 6.I give him a 10 1.We found that they were clever enough to learn English well.=2.Lesson Nine is the most difficult one in Book 2=3.He used a lot of money to buy things for his lab=4.he ran as fast as he could to catch the thief=5.all the student passed the exam but 某六年级有甲乙两个班,甲班人数是乙班的七分之五．如果从乙班调3人到甲班,甲班人数是乙班人数的五分之四．甲乙两班原来各有多少人? 说说理由有16个1立方分米的立方体商品,为它设计一个长方体包装箱,最节省包装纸的那种方法至少需要包装纸（ 40 ）平方分米（接头处忽略不计）.4×2×4＋2×2×2这样做的原因是什么 小明在日历上圈出五个数,呈十字行,他们的和是40,则中间的数是 叶绿素的化学本质是什么?