病毒含有的核酸通常是（）
A.DNA和RNA
B.DNA或RNA
C.DNA
D.RNA
参考答案：D
All the citizens here strongly insist those found _____ "harmful" advertisements in the streets be
punished strictly.[ ]
A. put up
B. to put up
C. being put up
D. putting up
洪水沉积作用
