[音频]Q: What is the man going to need to do?
A. Go out for a coffee.
B. Hand in his paper later.
C. Work until his paper is complete.
D. Take a rest.
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Q: Where do they eat their meals?
At home.
B. At the local restaurant.
C. In the college cafeteria.
D. At a hotel.
Q: According the speakers, what is the best part of going to college?
A. Doing things with other students.
B. Studying for tests.
C. Attending their classes.
D. Meeting many teachers.
这句话是什么意思？
A. 你好
B. 晚安
C. 再见
D. 你还好吗？
设二叉排序树中有n个结点，则在二叉排序树的平均平均查找长度为_________。
A. O(1)
B. O(log2n)
C. O(n)
D. O(n2)
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