酸雨的pH小于（）
A.7.0
B.6.5
C.5.6
D.5.0
E.4.6
参考答案：C
Don't worry. There's _______. But you must _______ the medicine and you'll be better.[ ]
A. nothing serious, take
B. seriously nothing, have
C. something wrong, eat
D. anything wrong, drink
《国语•楚语上》中记载的“（）”，较早地明确地提出了什么是美，美与善，美与功利的关系；
