能说几道就说几道,c,a,c,d1.They are trying to find a new way to _____ the spread of AIDS.A.delayB.keepC.arrestD.catch2This is the second time she _____ by her new friend and she shall never trust him again.A.has been let downB.was put downC.ha

excel求解!=lookup(1,0/(A:A&B:B=D1&E1),C:C)=lookup(1,0/(A:A&B:B=D1&E1),C:C) Decembeir1,2006 is the World AIDS Day?A.17th B.18th C.19th D.20th 判断下列每组单词括号部分的读音是否相同相同的写S不同的D1（th）is wi(th)2(a)nt (a)round3(c)ake pen(c)i4foll(ow ) d(ow)n 5n(ear) h(ear) ..就写A.B.C.D1.（）does he come back from school every day?a How long b How far c What time d What date2.How long can the naughty boy do his homework quirtly?( )a St three b For three hours c Three hours ago d After three hours3.How often does Th 数学几何代数题如图,已知Rt△ABC,D1 是斜边AB的中点,过 D1 作 D1 E1 ⊥ A C 于 E1 ,连接 B E1 交 C D1 于 D2 ；过 D2 作 D2 E2 ⊥ A C 于 E2 ,连接 B E2 交 C D1 于 D3 ;过 D3 作 D3 E3 ⊥ A C 于 E3 ,...,如此继续,可以 用平面几何问题 判断下列命题是否正确1. ∠B1 D1 C = 60° 2. 四边形 B1 D1 C A 为菱形 用平面的来判断下列命题是否正确1. ∠B1 D1 C = 60° 2. 四边形 B1 D1 C A 为菱形 ( )It's ____today.It is my birthday.A.Wednesday,April 10th B.May,4th,Friday C.7th,September,SundayD.Monday,5th,May 英语翻译A．September 25th,2010.B．July 25th,2010.C．September 25th,2009.D．July 25th 2009. 6,37,9,82,0,1,1.01（）A 1.0201 B 0.96 C 2.0201 D1.96 excel转置问题 如下 两列 A A1 B B1 C C1 D D1 如何转成 A A1 B B1 C C1 D D1全在一行第一列 A B C D第二列 A1 B1 C1 D1转成一行 A A1 B B1 C C1 D D1 已知b1/a1>d1/c1,b2/a2>d2/c2,a,b,c,d均为正数.求证(b1+b2)/(a1+a2)>(d1+d2)/(c1+c2) 英语问答题When is your birthday party?A:When is your birthday party?B1:My birthday party is october 1st.B2:My birthday party is on october 1st.B1、B2哪个正确?还是都对?C:When is your birthday?D1:My birthday is June 4th.D2:My birthday is World Water Day is on _______.A.March 12th B.March 22nd C.Marth 8th Tom is their _____son.a、the 2th b、 2th c、 the 2nd d、 2nd What is today?A.It's March The 11th.B.It's Sundday 17th C.It's Friday. 若5^a=2^b=√10^c,ABC不等于0,求C/a+c/b等于.A 4 B3 C2 D1 a b c线性无关d1 =a+b d2=b+c d3=a+c 求证3个d线性无关