do+a+magic+trick

郁点虎1996某同学作本上做了这么一道题:“当a=?时,试求a+√a2 - 2a+1的值”其中?是被墨水污染的,该同 -
雍园德18796215172 ______ 原式=a+√(a-1)²=a+|a-1| 若aa-1则原式=a+(1-a)=1≠1/2 若a≥1,a-1≥0 则原式=a+a-1=2a-1 若2a-1=1/2 则a=3/4,不符合a≥1

郁点虎1996how+long+is+a+piece+of+string是什么意思 -
雍园德18796215172 ______ how long is a piece of string?一根绳子有多长?双语对照 例句:1.The answer is: how long is a piece of string? 答案是:一根线有多长?2.It is a piece of exquisite beauty. 它是一件优美的珍品.

郁点虎1996用while或do - while语句编写程序,计算e约等于1+1/1!+1/2!+…+1/n!其中在1/n!小于等于10^( - 5)时结束.用C写.单循环. -
雍园德18796215172 ______[答案] 方法1 #include void main() { float e,a; int i,n=0; /*涉及到小数运算要用浮点型变量*/ e=1,a=1; /*a=1在后面有乘积运算*/ for(i=... return 0; } 方法3 #include void main() { int i=1,j=1; float e=1.0,k; do{ j=i*j; k=1.0/j; e=e+k; i++; }while(k>1e-5);/*判断误差是否...

郁点虎1996不定式作but/except的宾语时候时候+TO 什么时候不加TO -
雍园德18796215172 ______ 前面有do的各种形式的时候but/except后省去to,如:I can do nothing but wait. (有do)I have no choice but to wait.(无do)

郁点虎1996i've got many things to do,i dong't know where to begin 使用so+a/ad/v+that句型 -
雍园德18796215172 ______ I've got so many things to do that I don't know where to begin.

郁点虎1996判断句子类别,在括号里填上相应的序号.(A)S+V (B)S+V+O (C)S+V+P (D)S+V+IO+DO (E)S+V+O+OC( )1.You look beautiful.( )2.I love reading.( )3.The cat ... -
雍园德18796215172 ______[答案] (A)S+V (B)S+V+O (C)S+V+P (D)S+V+IO+DO (E)S+V+O+OC( C )1.You look beautiful.( B )2.I love reading.( E )3.The cat makes me happy.( D )4.He often gives me some advice.( A )5.She is dancing.( E )6.I can hear him singing in the next door.( B )7....

郁点虎1996pose+a+threat+to是什么意思 -
雍园德18796215172 ______ pose a threat to [英][pəuz ə θret tu:][美][poz e θrɛt tu] 成为...的威胁; United Nations agencies warn that Burma's food shortages and escalating prices pose a threat to its food security. 联合国机构警告说,缅甸食品短缺和不断上涨的食品价格对该国的食品安全构成了威胁.

郁点虎1996分析下列句子属于简单句的哪种类型 A.S+V B.S+V+DO C.S+V+P D.S+V+IO+DO E.S+V+DO+OC 1.Most students f1.Most students feel tired.2.Being too busy ... -
雍园德18796215172 ______[答案] A是主谓B是主谓宾C是主系表D是主谓+双宾语 E是主谓+宾+宾补语补足语

郁点虎1996Before+one+year,+she+couldn't+fly+a+kite+at+all.哪里错了?
雍园德18796215172 ______ one+year +Before, she+couldn't+fly+a+kite+at+all.

郁点虎1996英语造句so+形容词+a/am+单数名词+that so+many+名词+that造句 -
雍园德18796215172 ______[答案] You are a so careful a student that you will study well. 你是一名那么细心的学生,你一定能取得好成绩的 There are so many toys in the shop that I can't decide which to buy . 商店里有那么多的玩具,我都不知道该买那一个了!