集合M={（x，y）|x＞0，y＞0}，N={（x，y）|x+y＞0，xy＞0}_爱下问搜题

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问题选择题

集合M={（x，y）|x＞0，y＞0}，N={（x，y）|x+y＞0，xy＞0}则（　　）

A．M=N

B．M⊂N

C．M⊃N

D．M∩N=∅

答案

答案：A

完形填空

Once a man came to a wise man’s house and said, “I have many bad habits. Which of them should I __46___first?” The wise man said, “Never tell lies __47___always speak the truth.” The man___48__ to do so and went home.
At night the man was about to go out to steal. Before setting out, he __49__for a moment about the promise he made to the wise man. “If he asks me where I have been, what shall I say? Shall I say that I went out__50__?” No, I cannot say that, but nor can I __51__. If I tell the truth, everyone will start __52__me and call me a thief. I would be __53__ for stealing.” So the man __54__ not to steal that night, and gave up this __55__ habit.
Next day, he __56__ to drink wine. When he was about to do so, he said to himself, “What shall I say to the wise man __57__he asks me what I did during the day? I cannot tell a lie.” And so he gave up the __58__ of drinking wine.
In this __59__, whenever the man thought of doing something bad, he __60___ his promise to tell the truth at all times. __61___, he gave up all his bad habits and became a very __62__ person.
Telling the truth is a very good __63___. If you always speak the truth, you can save yourself from a lot of __64___ and become a person whom everyone __65__ and favors.
Make a promise: I shall always speak the truth.

B．Face to face

单项选择题 B型题

原发性肝癌呈（）

A."早出晚归"征

B.环征

C.双管征

D."快显快出"征

E.牛眼征