行政机关不得因当事人申辩而加重处罚。

（）年《土地管理法》颁布。

A．1982

B．1987

C．1986

D．1988

—Why are the two students standing at the gate of the teachers'office?

—They________to each other in class and________.[ ]

A. have whispered; are punishing

B. had whispered; were punished

C. whispered; are being punished

D. are whispering; were being punished

张某因欠缺专业知识，误将家中明代红木桌椅按一般家具价格卖给了收藏家李某。该合同属于（）。

A.有效合同

B.无效合同

C.可撤销合同

D.效力待定合同

曹利风认为思维科学体系的基础学科不包括：

A．认识论和逻辑学

B．哲学世界观和哲学史

C．神经生理学和神经解剖学

D．文化思想史