用真值表检验重言式与矛盾式需要针对所讨论的命题建立一个()。
A、重言式
B、矛盾式
C、真值列
D、真值行
参考答案:C
The usual address for a Web site is the (74) page address, although you can enter the address of any page and have that page sent to you.
A.home B.main C.host D.house
绿肥在施用时,将肥料堆放在池塘一角的水中,经常翻动,加速其(),最后把不易腐烂的部分捞出池外。