-ThepopulationofChinais1,370,530,000.Buthowtoreadthenumber?-Thatis.()A.thirteenbillion,seventymillion,fivehundredandthirtythousandB.onemillion,threehundredandseventytho
-The population of China is 1,370,530,000.But how to read the number?
-That is _____.( )
A. thirteen billion,seventy million,five hundred and thirty thousand
B. one million,three hundred and seventy thousand,five hundred and thirty
C. one billion,three hundred and seventy million,five hundred and thirty thousand
D. one billion,three hundred million,seventy hundred and fifty three thousand
选出画线部分发音不同的单词.怎么写?A.student(u)B.cute(u)C.but(u)A. 2020-05-14 …
-ThepopulationofChinais1,370,530,000.Buthowtoread 2020-06-10 …
模拟三设函数u(x,y)=B(x+y)+B(x-y)+∫[x-y→x+y]C(t)dt,其中函数B 2020-07-21 …
补集是否可以是空集补集的定义为设全集为u,a是u的子集,由u中不属于a的所有元素组成的集合称为a的 2020-07-29 …
设全集U={1234567}集合A={1357}集合B={35}则()A.U=A∪BB.U=(A) 2020-07-30 …
问一道高一数学的数集题,求答案就OK不用过程如题,设集合U={x丨-3≤x≤5},A={x丨-1< 2020-07-30 …
U={1,3},A={1,3},求CuA.补集的定义是若A是U是子集,那么集合U中除去集合A中的元 2020-07-30 …
下列命题中,假命题的个数是.①若A∩B=∅,则A=∅或B=∅;②命题P的否定就是P的否命题;③A∪ 2020-08-01 …
若非空集合A、B、U满足A∪B=U,A∩B=Φ,则称(A,B)为U的一个分割,则集合U={1,2,3 2020-12-07 …
x²/√(x²-a²)dx令u=x²-a²,得du=2xdx,∫x²/√(x²-a²)dx=∫(u+ 2021-01-07 …