MySaturday作文
On Saturday, I usually get up at around 08:00. I eat blackfish at 08:10. Then I do my homework. At about 10:00. I play computer at 12:00. I have lunch at 12:30. After lunch I listen to music. Then at 13:30 I do my homework. I eat dinner at 17:30. Then I watch TV at 16:00.I usually go to bed at around at 21:00.
找规律（数学）把一些英文字母按规律分成4组,现在还有4个字母D,M,Q,X请你按规律补上,其顺序依 2020-05-14 …
已知字母组合成英语单词1、e e t t i n h r 2、e e r a t w h 3、o 2020-05-14 …
2、设集合U={(x,y)|x∈R,y∈R},A={(x,y)|2x-y+m>0},B={(x,y 2020-05-16 …
x、y∈R,A={(x,y)|x2+y2=1},B={(x,y)|=1,a>0,b>0},当A∩B 2020-05-22 …
r(A*A^T)=r(A^T*A)=r(A)证明方程AX=0与A^TAX=0同解AX=0显然有A^ 2020-06-10 …
设全集U={(x,y)│x∈R,y∈R},M={(x,y)│y-3/x-2=1},P={（x,y） 2020-07-13 …
几道关于集合的题目十万火急的拉```~小女子在这求1已知U={(x,y）｜x∈R,y∈R},A={ 2020-07-30 …
若x,y∈R,A={(x,y)|(x+1)^2+y^2=2},B={(x,y)|x+y+a=0}, 2020-07-30 …
下列对应是从集合S到T的映射的是（）A.S=N，T={-1，1}，对应法则是n→（-1）n，n∈S 2020-08-02 …
时间t,在场所r=（x,y,z)声波在空气中的波动方程式是u（r,t)=(0,u0sin(a(t+y 2020-12-15 …