当刺激的间歇时间小于缩短期时,发生的收缩形式是()
A. 单收缩
B. 不完全强直收缩
C. 完全强直收缩
D. 先出现单收缩,然后发生不完全强直收缩
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How do you think we should treat Chinese civilization in the social and economic development of modern time?
Will the humanities be out of date?
现有a = [1, 2, 3, 4, 5],则a[:-1:3]的值是多少?
A. [1, 4]
B. [1, 2, 3]
C. [1, 2, 3, 4]
D. [1, 2, 3, 4, 5]
现有a = [1, 2, 3, 4],则a[::-1]的值是多少?
A. [1, 2]
B. [1, 2, 3]
C. [1, 2, 3, 4]
D. [4, 3, 2, 1]