判断下列反常积分的敛散性,如果是收敛的求出反常积分值.

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问题:

判断下列反常积分的敛散性,如果是收敛的求出反常积分值.

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考点:普通考研考研数学(一)考研数学一
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中药药剂学研究的内容包括( )

A.中药药剂的调配理沦

B.中药药剂的生产技术

C.剂型因素对药效的影响

D.中药药剂的合理应用

E.中药药剂的质量控制

题型:问答题

B

The Young Can't Wait

By Severn Cullies Suzuki

When you are little, it's not hard to believe you can change the world. I remember my enthusiasm when, at the age of 12, I addressed the delegates at the Rio Earth Summit. “I am only a child,” I told them. “Yet I know that if all the money spent on war was spent on ending poverty(贫困) and finding environmental answers, what a wonderful place this would be. In school you teach us not to fight with others, to work things out, to respect others, to clean up our mess, not to hurt other creatures, to share, not to be greedy. Then why do you go out and do the thing you tell us not to do? You grown-ups say you love us, but I challenge you, please, to make your actions reflect(反省) your words.”

I spoke for six minutes and received a standing ovation. Some of the delegates even cried. I thought that maybe I had reached some of them, that my speech might actually spur(刺激) action. Now, a decade(十年) from Rio, after I've sat through many more conferences, I'm not sure what has been accomplished. My confidence in the people in power and in the power of an individual's voice to reach them has been deeply shaken.

When I was little, the world was simple. But as a young adult, I'm learning that as we have to make choices—education, career, lifestyle—life gets more and more complicated. We are beginning to feel pressure to produce and be successful. We are taught that economic growth is progress, but we aren't taught how to pursue a happy, healthy or sustainable way of living. And we are learning that what we wanted for the future when we were 12 was idealistic and naive.

Today I'm no longer a child, but I'm worried about what kind of environment my children will grow up in. I know change is possible, because I am changing, still figuring out what I think. I am still deciding how to live my life. The challenges are great, but if we accept individual responsibility and make sustainable choices, we will rise to the challenges, and we will become part of the positive tide of change.

60.The purpose of what the writer said at the age of 12 was to _______.

A.end poverty and make school beautiful

B.find environmental answers and keep the words that they always told themselves

C.end poverty and solve the problems about environment

D.find a wonderful place and clean it up

61.What does the underlined word “ovation” in the second paragraph refer to _____.

A.a long period of laughing              B.a warm welcome

C.an expression used for greeting      D.a long period of clapping and applause

62.It becomes clear that the writer is possibly _________ now.

A.in his teens      B.in his twenties  C.in his thirties    D.in his forties

题型:问答题

下列是高兴同学在学习时收集的一些数据和对应的测量工具,完全正确的是(  )

A.初中生的身高一般在1.6m左右--学生三角板

B.初中生的体重一般在50g左右--台秤

C.人的正常体温一定是35℃--体温计

D.初中生的握力一般为450N左右--握力计

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从干散货船运输市场特点来看,干散货船运输的中、长期市场及专用船、兼用船运输市场,在一定程度上具有()倾向。

A.完全竞争市场结构

B.寡头垄断市场结构

C.完全垄断市场结构

D.垄断竞争市场结构

题型:问答题

航向道LOC偏差通常显示在:()。

A.ILS和VOR方式

B.VOR和计划方式

C.ILS和ARC方式

D.计划和航图方式

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