设集合A={|a+1|,3,5},B={2a+1,a2+2a,a2+2a-1},

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问题:

设集合A={|a+1|,3,5},B={2a+1,a2+2a,a2+2a-1},当A∩B={2,3}时,求A∪B.

考点:集合间交、并、补的运算(用Venn图表示)
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进行电焊前应作哪些准备工作?

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简述做准备活动的目的。

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男性,40岁,外伤后头痛、头昏、恶心、呕吐,入院后进行CT检查发现脑内血肿,查体见视 * * 水肿。患者颅压增高时不应采取哪项治疗措施

A.便秘用肥皂水高压灌肠
B.用甘露醇脱水
C.抽搐时用抗癫痫药物
D.昏迷多痰者,给予吸痰或气管切开
E.高热者物理降温

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How many of us would temp for three years while we waited for the perfect job Not many of us, perhaps. But Wentworth Miller, the "Prison Break" star, said he chose to wait even longer time (1) he found the right job.
"Actually I think it might have been three or four years until I was lucky enough to get guest (2) on TV shows," said Miller, 34, who rose to international stardom (3) to "Prison Break" in 2006. That kind of patience and p will was portrayed in "Prison Break". Miller (4) engineering wizard Michael Scofield, who tries everything to break out of a Chicago (5) with his brother. Miller said he was fond of his character, (6) he said "exists in shades of grey".
Miller comes from a (7) of teachers. He said he didn’t seem fated for a career in the arts, (8) his passion for acting. After (9) from Princeton with an English degree, he moved (10) his parents’ request to Los Angeles to look for a stable life. He started (11) in a little company that made television movies. This (12) simply faxing, filing, walking the boss’ dog and going to the store for the boss’ lunch. Every weekend during the summer, Miller (13) go to the office (14) he didn’t have air-conditioning. "I would hang (15) in the conference room and set up camp and rob the company kitchen," recalled Miller.
(16) , Miller realized he still had questions about his choice. He decided to quit. But the boss said he was making a mistake and offered him a well-paid assistant position. "I eventually (17) that if I did the corporate job, it would be great if I was successful, but I would always wonder about the (18) . If I did the acting and was successful, I would never wonder (19) that job," he explained. He quit and temped (20) many people in the entertainment industry.
Now, he’s a hot star and has people coming up to him at film festivals saying, "Weren’t you the one who (21) to stand by the copy machine "
"That was tough, but I’m glad I have that perspective. Because now I’m at a point (22) big shots laugh at all my jokes and I think, You know, I got coffee for people like you for six years’. So I know what’s (23) , because I’ve seen the other side." But what if, when he was offered the corporate job, there had been more money "It was never about the (24) There’s a kind of excitement that comes along with acting. I can’t find it anywhere else. Even if I had to go back to temping, even if this is not the beginning of an amazing career, I would not (25) making that jum
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在所有的细胞连接类型中,最为紧密的连接方式是()。

A.封闭连接

B.桥粒

C.黏着带

D.间隙连接

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