如图所示,将一个小球从h=5m的高处水平抛出,小球落到地面的位置与抛出点的水平距

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问题:

如图所示,将一个小球从h=5m的高处水平抛出,小球落到地面的位置与抛出点的水平距离x=4m.不计空气阻力.求:

(1)小球在空中运动的时间.

(2)小球抛出时速度的大小.

考点:平抛运动
题型:问答题

下列离子组一定能大量共存的是(     )

A.酚酞呈无色的溶液中:I-、CH3COO、NO3-、Na+

B.甲基橙呈黄色的溶液中: Na+、CO32、NO3-、NH4

C.含大量Al3+的溶液中: K+、Na+、NO3-、S2

D.pH>7-的溶液中:CO32-、Cl-、F-、K+

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强心苷加强心肌收缩力的作用来自糖部分。

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同种材料制成的两根导线,甲的电阻为3Ω,乙的电阻为10Ω,如果它们长度相等,那么导线的横截面积S_________S;如果把它们并联在同一电路的两点间,则它们两端的电压U_________U;如果把它们串联在同一电路中,则通过它们的电流I_________I(填“>”、“<”或“=”)

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Apple Inc co-founder and former CEO Steve Jobs, counted among the greatest American CEOs of his generation, died on Wednesday at the age of 56, after a-year-long and highly public battle with cancer. Jobs' death was announced by Apple in a statement late on Wednesday. The Apple.com homepage featured a black-and-white picture of him with the words "Steve Jobs, 1955-2011".

A message on the site read, "Apple has lost an imaginary and creative genius, and the world has lost an amazing human being. Those of us who have been fortunate enough to know and work with Steve have lost a dear friend and an inspiring leader."

"His greatest love was for his wife, Laurene, and his family. Our hearts go out to them and to all who were touched by his extraordinary gifts."

"Steve leaves behind a company that only he could have built, and his spirit will forever be the foundation of Apple." The Silicon Valley hero who gave the world the iPod and the iPhone had resigned as CEO of the world's largest technology corporation in August, handing the position to current chief executive Tim Cook.

Two years before the iPhone that forever transformed the way people around the world access and use the Internet, Jobs talked about how a sense of his death was a major driver behind that vision.

"Remembering that I'll be dead soon is the most important tool I've ever got to help me make the big choices in life," Jobs said during a Stanford commencement ceremony in 2005. "Because almost everything-all others' expectations, all pride, all fear of embarrassment or failure-these things just fall away in the face of death, leaving only what is truly important."

"Remembering that you are going to die is the best way I know to avoid the trap of thinking you have something to lose. You are already naked. There is no reason not to follow your heart."

小题1:According to the passage, which statement of Steve Jobs is RIGHT?

A.Steve Jobs was the present CEO of Apple.

B.Steve Jobs was thought to have great talent.

C.Steve Jobs had no idea about his death before.

D.Steve Jobs fought against cancer for a year secretly.小题2:What can we learn about iPhone from the passage?

A.People can use it to do anything they want.

B.It can teach people how to surf the Internet.

C.People can learn the spirit of Apple from it.

D.It can change the way people use the Internet.小题3:In Jobs's speech in Stanford, we can learn that                         .

A.to make great achievements, you must lose everything

B.people should try to achieve everything regardless of death

C.people who will be dead soon must make big choices in life

D.in the face of death, nothing is truly important except to follow your dream小题4:What’s the main idea of the passage?

A.Steve Jobs changed the world.

B.Steve Jobs died on Wednesday.

C.Who will be the next Steve Jobs?

D.Steve Jobs, the greatest American CEO.

题型:问答题

某县卫生局对某医院违规行为准备进行行政处罚,下列表述正确的是()。

A.无须参照县人民政府发布的行政执法指导案例

B.处理与行政执法指导案例相同的行政事务,除客观情况变化外,可以参照县人民政府发布的行政执法指导案例

C.处理与行政执法指导案例相同的行政事务,除法律依据和客观情况变化外,应当作出与行政执法指导案例基本相同的处罚决定

D.应当作出与行政执法指导案例完全相同的处罚决定

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