Since Wallerstein's study, ______.
A. there are fewer divorces
B. children of divorce no longer get therapy
C. times and attitudes toward divorce have changed
D. people don't talk about divorce any more
第1题:
15.
A.much
B.more
C.less
D.fewer
第2题:
第3题:
第4题:
第5题:
第6题:
假设我们定义了以下谓词: Study(x) x肯学习 Lucky(x) x是幸运的 那么下列哪个谓词公式对于以下知识的表示是正确的? "小张不肯学习但他是幸运的"
A.﹁Study(zhang)∧Lucky(zhang)
B.﹁(Study(zhang)∧Lucky(zhang))
C.﹁(Study(zhang)∨Lucky(zhang))
D.﹁Study(zhang)∨Lucky(zhang)