【单选题】若x>0,y>0,M>0,a>0,且a≠1,已知下列运算: 1 (xy)= x· y; 2 (x-y)= ; 3 = x- y; 4 ( )=n M.其中正确的个数有
【单选题】The government will speed up the pace of shifting the focus of its pro-active fiscal policy from ( ) economic growth to sustainable development.政府将加快转变步伐,将积极的财政政策的重点由刺激经济增长转变为寻求可持续发展。
【简答题】已知方程组 y 2 =4x y=2x+m 有两组实数解 x= x 1 y= y 1 , x= x 2 y= y 2 ,且x 1 ≠x 2 ,x 1 x 2 ≠0,设n=- 2 x 1 - 2 x 2 . (1)求m的取值范围; (2)用含m的代数式表示n; (3)是否存在这样的m的值,使n的值为-2?如果存在,求出这样的m的值;若不存在,说明理由.
【单选题】若集合M={0,1,2},N={(x,y)|x-2y+1≥0且x-2y-1≤0,x,y∈M},则N中元素的个数为( )
【单选题】Why Turks demonstrated in Istanbul?
A.
To protest the pro-Islamic government.
B.
To protect the pro-Islamic government.
C.
To weaken laws separating religion and government.
【单选题】Poland government is pro-American.
【单选题】议付行对信用证受益人的单据和汇票进行议付,这种行为( )。
【单选题】The author might suggest the government to .
A.
reduce competition among internet access providers
B.
pr network operators from blocking particular services
C.
put more efforts in ensuring network neutrality
D.
getting phone and cable companies to open up their networks
【单选题】议付行对信用证受益人的单据和汇票进行议付,这种行为( )。