琼脂()
A.成囊材料
B.增塑剂
C.遮光剂
D.防腐剂
E.增稠剂
参考答案:E
设f(x)=ax+b同时满足条件f(0)=2和对任意x∈R都有f(x+1)=2f(x)-1成立.
(1)求f(x)的解析式;
(2)设函数g(x)的定义域为[-2,2],且在定义域内g(x)=f(x),且函数h(x)的图象与g(x)的图象关于直线y=x对称,求h(x);
(3)求函数y=g(x)+h(x)的值域.
27.Many students were watching the story of the heroes from Changjiang University on TV, ________ moved to tears.
A.all of them
B.all of whom
C.all of that
D.all of which