神马作文网一道逻辑题目：Which of the following statements.
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一道逻辑题目：Which of the following statements.
Which of the following statements is logically equivalent to:"if he studies,he will pass the course"
A.He passed the course; therefore,he studied
B.He did not study; therefore,he will not pass the course.
C.He did not pass the course; therefore he did not study.
D.He will pass the course only if he studies.
E.None of the above.
Which of the following statements is logically equivalent to:"if he studies,he will pass the course"
A.He passed the course; therefore,he studied
B.He did not study; therefore,he will not pass the course.
C.He did not pass the course; therefore he did not study.
D.He will pass the course only if he studies.
E.None of the above.
应该是C 如果学习了,他就会过.所以如果没过,一定没学习.
再问： 能详细解释下吗？刚开始接触，感觉B和C也有点对，概念比较模糊。
再答： 题目是If A, then B.
B选项是 If no A，then no B 顺序不对。
C选项是if no B, then no A. 没通过考试，肯定是没学习，因为如果学了，必然通过考试.
这样明白吗？逻辑题练练就有感觉了！
再问： 能详细解释下吗？刚开始接触，感觉B和C也有点对，概念比较模糊。
再答： 题目是If A, then B.
B选项是 If no A，then no B 顺序不对。
C选项是if no B, then no A. 没通过考试，肯定是没学习，因为如果学了，必然通过考试.
这样明白吗？逻辑题练练就有感觉了！
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