Q10:
A set of numbers has the property that for any number t in the set, t + 2 is in the set. If –1 is in the set, which of the following must also be in the set?
I. -3
II. 1
III. 5
A. I only
B. II only
C. I and II only
D. II and III only
E. I, II, and III
Answer:
给出的答案是D,但是我觉得应该选择E
举报
D吧,有-1肯定有1,有1肯定有3,有3肯定有5
但是-3不能保证
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