A-A+
A necessary cause is ______.A．one without whic
问题详情
A necessary cause is ______.
A．one without which it is impossible for the effect to occur
B．one of the causes that can produce the effect
C．one that is enough to make the effect occur
D．None of them.
参考答案
正确答案：A
解析：见第三段第二句：A necessary cause is one which must be present for the effect to occur，…
