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【简答题】
分析下面语句段执行的时间复杂度。 (1) for (i = 1; i <= n ; i ++) for (j = 1; j <= n ; j ++) s ++; (2) for (i = 1; i <= n ; i ++) for (j = i; j <= n ; j ++) s ++; (3) for (i = 1; i <= n ; i ++) for (j = 1; j <= i; j ++) s ++; (4) i = 1; k = 0; while (i <= n - 1) { k += 10 * i; i ++; }
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举一反三
【多选题】关于咽的淋巴组织描述正确的是（）
A.
咽部粘膜下淋巴组织丰富，较大淋巴组织团块呈环状排列，称咽淋巴环
B.
咽部淋巴均流入颈深淋巴结
C.
腺样体出生后会长期存在，为内淋巴的一部分
D.
内环淋巴流向颈部淋巴结，后者又相互交通，自成一环，称外环
E.
如咽部的感染或肿瘤不能为内环的淋巴组织所局限，可扩散或转移到相应的外环淋巴结
【单选题】关于咽的淋巴组织，下列说法不正确的是（）。
A.
咽部黏膜下淋巴组织丰富，较大淋巴组织团块呈环状排列，称为咽淋巴环
B.
咽部淋巴均流入颈深淋巴结
C.
内环淋巴流入颈部淋巴结，后者又自成一环，称为外环
D.
腺样体出生后会长期存在，为咽淋巴内环的一部分
E.
咽部的感染和肿瘤可由内环的淋巴组织扩散到外环的淋巴组织
【单选题】听力原文：W: Does your sister enjoy music? M: Very much. Her husband used to play in a symphony orchestra. And they have a lot in common. According to the man, who played in the orchestra?
A.
His sister.
B.
His sister and his sister's husband.
C.
His sister's husband.
D.
Neither his sister nor his sister' husband.
【单选题】听力原文：W: Yes. It was a year ago that my husband and I decided to change roles. M: Why did you suddenly think of exchanging roles? W: A year ago, I was beginning to get bored at home all day. My husband...
A.
Because she has been bored about the housework.
B.
Because she has got a job at a salary higher than her husband's.
C.
Because she wants to communicate with the people.
D.
Because she finds it interesting to work outside.
【单选题】听力原文：W: You read this? A couple that couldn't have a baby cloned the husband, and the wife is now in the family way! M: Oh, you mean the wife is going to give birth to her husband? W: Right. The child...
A.
The wife.
B.
The husband.
C.
The baby.
D.
A sheep.
【单选题】What is the agreement between husband and wife?
A.
They two will share the housework.
B.
The wife should remind the husband about his housework.
C.
The husband should clean the living room when it looks dirty.
D.
The wife should clean the living room when it looks dirty.
【单选题】听力原文：M: Is there anything wrong，Miss? W: My husband and I have kept waiting for nearly an hour for our meal． Q: How did the woman feel about the restaurant's service? (5)
A.
Upset．
B.
Dissatisfied．
C.
Happy．
D.
Enjoyable．
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