Mymum’slettersreallyencouragedmemyillness.()A.overB.forC.throughoutD.within
My mum’s letters really encouraged me _____ my illness.( )
A. over
B. for
C. throughout
D. within
over超过,在上方;for为了,因为;throughout自始至终,在…期间;within在…范围内.题干表示的是在我生病期间,故选C.
已知直线 y=-3/4x+m与x轴y轴分别交于点A和点B,点B的坐标为(0,6) (1)求的m值和 2020-05-13 …
两人在400m的跑道上方向相反时32s相遇一次,方向相同3min遇一次,蛇两人速度x(m/s)y( 2020-05-23 …
A.F,H,C,D,P,A,M,Q,R,S,Y,XB.P,A,C,S,Q,D,F,X,R,H,M,Y 2020-05-26 …
15a^3b^2+5a^2b-20a^2b^x-45bxy2m(a-b)-3n(b-a)(a-3) 2020-06-06 …
高数证明题,求高手帮忙.f(x,y)满足:对任意实数a,存在常数m,有f(ax,ay)=f(x,y 2020-06-06 …
设一组初始记录关键字序列为(Q,H,C,Y,P,A,M,S,R,D,F,X),则按字母升序的第一趟 2020-07-17 …
直线y=2根号下3/3kx+m(-1/2≤k≤1/2)经过A(2根号下3,4)且与y轴交于c,B在y 2020-10-30 …
设a=lg(x/y+z)b=lg(yz+1/x)c=lg(1/xz+y)记M=max{a,b,c}, 2020-11-01 …
设非空集合A={x|-1≤x≤m},集合S={y|y=x+1,x∈A},T={y|y=x2,x∈A} 2020-11-12 …
若集合M={y|y=3x},集合S={x|y=lg(x-1)},则下列各式正确的是()A.M∪S=M 2020-11-15 …