题目:
Are there exactly 3 distinct symbols used to create the code words in language Q ?()
(1)The set of all code words in language Q is the set of all possible distinct horizonal arrangements of one or more symbols, with no repetition.
(2)There are exactly 15 code words in language Q.
A.条件(1)充分,但条件(2)不充分.
B.条件(2)充分,但条件(1)不充分.
C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分.
D.条件(1)充分,条件(2)也充分.
E.条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.
答案:
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