在“验证机械能守恒定律”的实验中,要从几条打上点的纸带中挑选第一、二两点间的距离

题型:计算题

问题:

在“验证机械能守恒定律”的实验中,要从几条打上点的纸带中挑选第一、二两点间的距离接近________________mm并且点迹清晰的纸带进行测量.若以v2/2为纵轴,以h为横轴,根据实验数据绘出的v2/2-h图线应是_____________,而且v2/2-h图线的斜率等于_____________的数值,才能验证机械能守恒定律.

考点:机械能守恒定律
题型:计算题

ICCIDD是指()。

A.地方病协会

B.中国碘缺乏病考评组

C.国际碘缺乏病控制中心

D.国际控制碘缺乏病理事会

E.中国碘缺乏病专家咨询组

题型:计算题

下列哪条不符合颈内动脉系统TIA

A.发作性偏瘫
B.一过性失明
C.猝倒发作
D.偏盲
E.失语

题型:计算题

男性,38岁,外伤脾破裂,急诊手术后第3天,出现气急,R34次/分,双肺散在湿性啰音,血气分析示:pH7.520,PaCO230mmHg,PaO250mmHg,X线胸片检查未见明显异常。

下列哪项处理最合适()

A.呼吸机支持通气

B.呋塞米(速尿)静注

C.肝素针应用

D.加强抗感染

E.血液透析

题型:计算题

以下无毒的是

A.白花蛇

B.乌梢蛇

C.全蝎

D.蜈蚣

题型:计算题

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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