某星球半径为R，在这个星球表面以初速竖直上抛一个物体，没有空气阻力的影响，经过t

C

When Mary Moore began her high school in 1951, her mother told her, "Be sure and take a typing course, so when this show business thing doesn’ t work out, you’ 11 have something to rely on. " Mary responded in typical teenage fashion. From that moment on, "the very last thing I ever thought about doing was taking a typing course," she recalls.

The show business thing worked out, of course. In her career, Mary won many awards. Only recently, when she began to write Growing Up Again, did she regret ignoring her mom, " I don’ t know how to use a computer," she admits.

Unlike her 1995 autobiography, after all, her second book is less about life as an award-winning actress and more about living with diabetes (糖尿病). All the money from the book is intended for the Juvenile Diabetes Research Foundation (JDRF), an organization she serves as international chairman. "I felt there was a need for a book like this," she says. "I didn’ t want to lecture, but I wanted other diabetics to know that things get better when we’ re self-controlled and do our part in managing the disease. "

But she hasn’ t always practiced what she teaches. In her book, she describes that awful day, almost 40 years ago, when she received two pieces of life-changing news. First, she had lost the baby she was carrying, and second, tests showed that she had diabetes. In a childlike act, she left the hospital and treated herself to a box of doughnuts (甜甜圈). Years would pass before she realized she had to grow up-again-and take control of her diabetes, not let it control her. Only then did she kick her three-pack-a-day cigarette habit, overcome her addiction to alcohol, and begin to follow a balanced diet.

Although her disease has affected her eyesight and forced her to the sidelines of the dance floor, she refuses to fall into self-pity. "Everybody on earth can ask, ’why me’ about something or other," she insists. "It doesn’t do any good. No one is immune (免疫的) to heartache, pain, and disappointments. Sometimes we can make things better by helping others. I’ve come to realize the importance of that as I’ ve grown up this second time. I want to speak out and be as helpful as I can be. \

Why did Mary feel regretful().

A. Because she didn’t achieve her ambition.

B. Because she didn’ t take care of her mother.

C. Because she didn’ t complete her high school.

D. Because she didn’ t follow her mother’ s advice.

可与月经后期同时伴见的病证有

A．月经过多

B．月经过少

C．崩漏

D．痛经

E．闭经

某有机物组成中含碳54.5%, 含氢9.1%，其余为氧，又知其蒸汽在标准状况下的密度为3.94 g/L，试求其分子式。

材料1 朝鲜半岛核问题是美苏冷战时期的产物。美国在朝鲜战争后将核武器部署在韩国，从而对朝鲜构成严重威胁。在苏联帮助下，朝鲜在大川和宁边两地建造了和平利用核能的设施，其中的核反应堆能提炼用于生产核武器的钚。朝鲜核问题由此而生。1994年10月，朝美签订日内瓦核协议，对双方均作出了必要的规定，但朝美相互指责对方没有履行协议规定的应尽义务。2002年，朝核问题出现危机，美国认为朝鲜必须立即停止其核计划，这是通过对话化解危机的前提；拒绝与朝鲜签订互不侵犯条约；力图在外交上孤立朝鲜，采取封锁等手段并向朝鲜施加压力。 摘自2003年第2期《嘹望》 材料2 中国积极斡旋朝核危机。在中国的努力下，2003年8月，朝、韩、美、日、俄、中六国在北京举行了第一轮六方会谈。2()04年2月和6月又举行了第二轮和第三轮。2005年7—9月第四轮六方会谈以《共同声明》的通过告终。在《共同声明》中，朝鲜放弃一切核武器和现有核计划，美国和日本承诺将与朝鲜实现关系正常化；有关各方将另行谈判建立朝鲜半岛永久和平机制；通过双方和多边方式促进能源、贸易及投资领域的经济合作。 摘自2005年9月21日《人民日报》 请回答： (1)结合六方会谈评析冷战后大国关系的变化。 (2)简要说明中罔在朝核危机问题上的立场。 (3)评析中国在六方会谈中的作用。

下述哪项照式技术不属于三维适形放疗技术（）

A.调强放射治疗

B.X-刀

C.伽马刀

D.赛博刀

E.面颈联合照射野