消化性溃疡腹痛产生的原因是()
A.溃疡及其周围组织炎症
B.局部肌张力增高
C.胃壁痉挛
D.胃酸对溃疡面刺激
E.胃排空快
参考答案:A, B, C, D
奇函数f(x)满足对任意x∈R都有f(x)+f(4﹣x)=0,且f(1)=8,则f(2010)+f(2011)+f(2012)的值为( )
-Can you tell me _______ to travel to Dalian?
-About two hours by plane.
A.how much it costs
B.what I should take
C.how long it takes
D.which is the best season