B)听录音,选择正确的应答。(听两遍)()1.A.BecauseI'mshort.B.BecausetheshoEdoesn’tfit.C.BEcausemyfootisbig.()2.A.He'ssixty.B.Helivesonafarm.C.He'sinashop.()3.A.Atsev
B) 听录音,选择正确的应答。(听两遍)
( ) 1. A. Because I'm short.
B. Because the shoE doesn’t fit.
C. BEcause my foot is big.
( )2. A. He's sixty. B. He lives on a farm.
C. He's in a shop.
( ) 3. A. At seven o’clock. B. On foot.
C. It's very far.
( ) 4. A. I'm happy. B. I have a cough.
C. I have a toy.
( )5. A. You should walk. B. You should have a rest.
C. You should ask the way.
已知实数a,b满足ab=1,求值:(1)1+a分之b+1+b分之b; (2)1+a的平方分之1 + 2020-04-05 …
如果有理数ab满足ab-2的绝对值+1-b的绝对值=0,试求:ab/1 + (a+1)(b+1)/ 2020-04-06 …
2.证明:(1)a,b为不等的正整数,1/a、1/b的算术平均值为1/6==>a、b的算术;2.证 2020-06-13 …
证明:(1)a,b为不等的正整数,1/a、1/b的算术平均值为1/6==>a;;证明:(1)a,b 2020-06-13 …
如果有理数a,b满足(ab-2)的绝对值+(1-b)的2次方=0试求a×b分之1+(a+1)×(b 2020-07-20 …
a.b满足a乘b=1,则1/1+a+1/1+b与a/1+a+b/1+b的大小关系如何? 2020-07-29 …
已知圆x^2+y^2+2x-4y+1=0关于直线2ax-by+2=0(a>0,b>0)对称,则4/ 2020-08-01 …
已知a,b为正整数,且a+b=1,求y=(a+1/a)(b+1/b)的最小值.解析,先对ab+1/ 2020-08-03 …
(1)已知a+b=-c,则a(1/a+1/b)+b(1/a+1/c)+c(1/a+1/b)的值是多少 2020-10-31 …
ax+by=1过点(1,1)求1/a+1/b的最小值的问题法是(a+b)*(1/a+1/b)大于等于 2020-12-07 …