把危机看成是新旧体制转化过程中的混乱状态的学者是（）
A.福斯特
B.罗森塔尔
C.皮尔逊
D.苏伟伦
参考答案：D
29. If city noises____from increasing, people___shout to be heard even at the dinner table 20 years from now.
A．are not kept; will have to
B．are not kept; have to
C．do not kept; will have to
D．do not kept; have to
单胃草食动物的大肠可以消化饲料中的粗纤维。
