袋中有红色、白 * * 各一个,每次任取一个,有放回地抽三次,计算下列事件的概率: (

题型:解答题

问题:

袋中有红色、白 * * 各一个,每次任取一个,有放回地抽三次,计算下列事件的概率:

(1)三次颜色恰有两次同色;

(2)三次颜色全相同;

(3)三次抽取的球中红 * * 出现的次数多于白 * * 出现的次数.

考点:古典概型的定义及计算
题型:解答题

Maybelle said she wouldn't be coming with me to the library. I asked why, and she said she could get all the short stories she wanted off the Internet. Saved walking all the way to the library, and putting up with my long chat on the way there, and on the way back. Maybelle is very direct like that, always has been.

"But, Maybelle, we've been walking to the library every' Monday for the last fifty years!"

She said," Why don't you get Internet'? We can send each other emails."

So I had to get Internet. I called the local high school. They said they'd send me a good student to tell me all about computers and such.

Evil thing, this Internet. Makes you lose old friends, forces you to learn new complex ideas, even if you're too old. But Maybelle said you have to be modern; otherwise, you're dead.

The kid came the next day. Tall skinny black kid, by tile name of Arsenius, said his work would cost me.

I said, "All right. As long as I get Internet."

"You need a computer, then you need to get hooked up," he said.

"Let's buy a computer and get hooked up, then."

"How much you want to spend?"

"Whatever it takes."

"How many rams you want?"

I wasn't going to show him my ignorance, so I said, "Whatever it takes."

"Let's go to the mall. You got a car?"

"In the garage."

When I opened the garage door, he gasped. Daddy's car is still there, a'57 Chevy. I never drive it. Walk everywhere.

I said," Let's walk. It's only a mile or so."

He said," Let's drive, or you will faint on me in this heat."

"Young man, I don't faint, never have. We're walking."

"I get paid by the hour," he said. "Walking will cost you a lot more. Also, you feel like carrying a computer a mile or so?"

小题1:What kind of person is Maybelle?

A.She always says what she means in an honest way.

B.She no longer likes reading in her old age.

C.She doesn't want to be friends with the writer any mort.

D.She doesn't want to keep up with the time.小题2:Why does the writer want to have Internet at his place?

A.Because the writer believes that one is never too old to learn.

B.Because the writer thinks that it is better late than never.

C.Because of the pressure from people of his age.

D.Because of the convenience the Internet will bring.小题3:Arsenius gives _________ reasons for driving to the mall.

A.two

B.three

C.four

D.five

题型:解答题

发现燃料气带液,应该立即降温熄灭炉子。()

题型:解答题

诊断急性纤维蛋白性心包炎最具特征的体征是

A.心界随体位改变
B.心包摩擦音
C.心音低钝
D.奇脉
E.颈静脉怒张,肝大

题型:解答题

作业验收管理值为()后的质量检查标准。

A.周期检修

B.综合检修

C.经常保养

D.临时补修

题型:解答题

简述等离子体聚合特有的反应过程。

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