在光的折射现象中,如表列出的是光由空气射入玻璃时入射角与折射角的一组数据,比较这

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问题:

在光的折射现象中,如表列出的是光由空气射入玻璃时入射角与折射角的一组数据,比较这些数据可看出,折射角与入射角之间存在以下关系:

(1)______;

(2)______.

入射角θ1折射角θ2
10°6.7°
20°13.3°
30°19.6°
40°25.2°
50°30.7°

考点:光的折射规律及其应用
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我国根据某些传染病的发病规律,有计划地对儿童及青少年进行预防接种,比如通过接种卡介苗预防结核病,下列有关叙述错误的是 [ ]

A.接种卡介苗预防结核病属于非特异性免疫

B.接种的卡介苗属于抗原

C.计划免疫有利于保护少年儿童健康,提高人口素质

D.接种卡介苗能使人在不发病的情况下产生抗体

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因为低压有利于解吸操作,所以在正常操作中解吸塔操作压力比吸收塔低。

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飞龙股份有限公司申请股票上市交易需具备哪些条件

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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
p.\

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碗扣式钢管脚手架中的重型架一般取较小的立杆纵距(090m或12Om),用于重载作业或作为高层外脚手架的底部架。()

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