跳水皇后伏明霞在1992年巴塞罗那奥运会上夺得10m跳台冠军时只有14岁,是奥运

题型:问答题

问题:

跳水皇后伏明霞在1992年巴塞罗那奥运会上夺得10m跳台冠军时只有14岁,是奥运会历史上最年轻的世界冠军(由于后来国际奥委会规定运动员只有年满15周岁才能参赛,所以这是一个以后不能打破的世界记录).若伏明霞迈步从10m高的跳台上竖直落下.(g=10m/s2

求:(1)她在空中做动作的时间有多少?

(2)她入水时的速度是多少?

考点:自由落体运动
题型:问答题
已知α为第二象限角,且tanα=-
15
,则
sin(α+
π
4
)
sin2α+cos2α+1
的值为______.
题型:问答题

老年人鼻出血的好发部位()

A.Little动脉丛

B.鼻腔后部

C.鼻前庭

D.Kiesselbach静脉丛

E.鼻腔前部

题型:问答题


In the following passage, there are 20 blanks representing words that are missing from the context. Below the passage, each blank has 4 choices marked by letter A, B, C and D respectively. There is only ONE right answer. Blacken the corresponding letter as required on your Machine-scoring ANSWER SHEET.

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 (91) he found the right job.
"Actually I think it might have been three or four years until I was lucky enough to get guest (92) on TV shows," said Miller, 34, who rose to international stardom (93) to "Prison Break" in 2006. That kind of patience and p will was portrayed in "Prison Break". Miller (94) engineering wizard Michael Scofield, who tries everything to break out of a Chicago (95) with his brother. Miller said he was fond of his character, (97) he said "exists in shades of grey".
Miller comes from a (97) of teachers. He said he didn’t seem fated for a career in the arts, (98) his passion for acting. After (99) from Princeton with an English degree, he moved (100) his parents’ request to Los Angeles to look for a stable life. He started (101) in a little company that made television movies. This (102) simply faxing, filing, walking the boss’ dog and going to the store for the boss’ lunch. Every weekend during the summer, Miller (103) go to the office (104) he didn’t have air-conditioning. "I would hang (105) in the conference room and set up camp and rob the company kitchen," recalled Miller.
(106) , 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 (107) that if I did the corporate job, it would be great if I was successful, but I would always wonder about the (108) . If I did the acting and was successful, I would never wonder (109) that job," he explained. He quit and temped (110) many people in the entertainment industry.

A.for

B.in

C.by

D.on

题型:问答题

对于中国这样一个发展中的大国来说,没有与国家发展相适应的(),就不会有相应的国际地位。

A、国防力量

B、经济基础

C、政治手段

题型:问答题

关于淋巴系统,以下说法正确的是()

A.是心血管的组成部分

B.由淋巴管和淋巴结构成

C.淋巴结产生淋巴液

D.全身的淋巴经右静脉角回流

E.是人体重要的防护屏障

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