单项选择题

When RANDOMIZED-SELECT runs, how many calls are made to the random-number generator RANDOM in the worst case? What about in the best case?

A．

;

B．

;

C．

;

D．

;

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单项选择题

‍以下脓疱为非感染性的是（）

A．带状疱疹
B．脓疱型银屑病
C．脓疱疮
D．单纯疱疹

4. He wants to have fried rice and steamed fish.
正确
错误

答案：错误