皮皮学，免费搜题
登录
logo - 刷刷题
搜题
【简答题】
已知函数 f(x)= 1 2 x 2 +alnx （ a为常数、a∈R）， g(x)=f(x)- 2 3 x 3 ． （1）讨论函数f（x）的单调性； （2）当a=1时，判断函数g（x）的零点的个数，并说明理由．
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案：
举一反三
【简答题】传感器的定义是什么?它一般包含哪两种元件?这两种元件分别是如何定义的?
查看完整题目与答案
【简答题】听下面10段对话，选出最佳答案。每段对 话听两遍。 1. What’s the man’s favourite fruit? A. B. C. 2 How does Jack go to school every day? A. B. C. 3 What does Tom’s father do? A. B. C. 4 What festival is it? A. B. C. 5 What ar...
查看完整题目与答案
【单选题】改革开放40年来,我国民营经济从小到大、从弱到强,不断发展壮大。概括起来说,民营经济具有“五六七八九”的特征,即贡献了50%以上的税收,60%以上的国内生产总值,70%以上的技术创新成果,80%以上的城镇劳动就业,90%以上的企业数量。我国经济发展能够创造中国奇迹,民营经济功不可没。下面说法错误的是( )
A.
实现中华民族伟大复兴中国梦的重要力量
B.
推动社会主义市场经济发展的重要力量
C.
建设现代化经济体系的重要主体
D.
控制国民经济命脉的主导力量
查看完整题目与答案
【单选题】Which is one of the results of improved medical skills?
A.
Making the problem of food shortage even more serious.
B.
Increasing the awareness of the world’s large population.
C.
Increasing the number of babies who survive early childhood.
D.
Providing world population with more nutrition ever before.
查看完整题目与答案
【简答题】A. for B. on C. stress D. profits E. made F: connection G. take H. indicating I. benefits J. s...
查看完整题目与答案
【单选题】Malthus was too pessimistic because he did not foresee the effects of
A.
ever increasing amounts of land for cultivation.
B.
increases in the capital stock and the effects of such increases on production.
C.
improved nutrition and health care.
D.
improved family planning practices.
查看完整题目与答案
【单选题】7 What’s the man’s attitude towards US withdrawal from Paris Agreement?
A.
He firmly believes it will be damaging.
B.
He is not sure whether it will be damaging.
C.
He predicts that it will not be sufficient to limit global-mean temperature increase to two degrees.
D.
He predicts the world's largest historical emitter and the current second largest emitter will pull out of the Paris Accord.
查看完整题目与答案
【单选题】What is the main idea of this passage?
A.
The progress of medicine has improved the health of ordinary people to the level of the rich in the 19th century.
B.
The industrial revolution reduced disease and death by providing better medicine, washable fabric and richer nutrition.
C.
Improvements in medicine, personal hygiene and nutrition together greatly improved people's health and life expectancy.
D.
Our knowledge about diseases and nutrition has greatly improved since the 19th century.
查看完整题目与答案
【单选题】Improved (nutrition) standards will exert pressure on increases in global food supply.
A.
营养
B.
托儿所；苗圃
C.
小说家
查看完整题目与答案
【简答题】China is pushing forward a nationwide trial on fortified food, in a bid to improve the health of its citizens. About 30,000 people from the country’s western region have used fortified flour for two y...
查看完整题目与答案
相关题目：
【简答题】传感器的定义是什么?它一般包含哪两种元件?这两种元件分别是如何定义的?
查看完整题目与答案
【简答题】听下面10段对话，选出最佳答案。每段对 话听两遍。 1. What’s the man’s favourite fruit? A. B. C. 2 How does Jack go to school every day? A. B. C. 3 What does Tom’s father do? A. B. C. 4 What festival is it? A. B. C. 5 What ar...
查看完整题目与答案
【单选题】改革开放40年来,我国民营经济从小到大、从弱到强,不断发展壮大。概括起来说,民营经济具有“五六七八九”的特征,即贡献了50%以上的税收,60%以上的国内生产总值,70%以上的技术创新成果,80%以上的城镇劳动就业,90%以上的企业数量。我国经济发展能够创造中国奇迹,民营经济功不可没。下面说法错误的是( )
A.
实现中华民族伟大复兴中国梦的重要力量
B.
推动社会主义市场经济发展的重要力量
C.
建设现代化经济体系的重要主体
D.
控制国民经济命脉的主导力量
查看完整题目与答案
【单选题】Which is one of the results of improved medical skills?
A.
Making the problem of food shortage even more serious.
B.
Increasing the awareness of the world’s large population.
C.
Increasing the number of babies who survive early childhood.
D.
Providing world population with more nutrition ever before.
查看完整题目与答案
【简答题】A. for B. on C. stress D. profits E. made F: connection G. take H. indicating I. benefits J. s...
查看完整题目与答案
【单选题】Malthus was too pessimistic because he did not foresee the effects of
A.
ever increasing amounts of land for cultivation.
B.
increases in the capital stock and the effects of such increases on production.
C.
improved nutrition and health care.
D.
improved family planning practices.
查看完整题目与答案
【单选题】7 What’s the man’s attitude towards US withdrawal from Paris Agreement?
A.
He firmly believes it will be damaging.
B.
He is not sure whether it will be damaging.
C.
He predicts that it will not be sufficient to limit global-mean temperature increase to two degrees.
D.
He predicts the world's largest historical emitter and the current second largest emitter will pull out of the Paris Accord.
查看完整题目与答案
【单选题】What is the main idea of this passage?
A.
The progress of medicine has improved the health of ordinary people to the level of the rich in the 19th century.
B.
The industrial revolution reduced disease and death by providing better medicine, washable fabric and richer nutrition.
C.
Improvements in medicine, personal hygiene and nutrition together greatly improved people's health and life expectancy.
D.
Our knowledge about diseases and nutrition has greatly improved since the 19th century.
查看完整题目与答案
【单选题】Improved (nutrition) standards will exert pressure on increases in global food supply.
A.
营养
B.
托儿所；苗圃
C.
小说家
查看完整题目与答案
【简答题】China is pushing forward a nationwide trial on fortified food, in a bid to improve the health of its citizens. About 30,000 people from the country’s western region have used fortified flour for two y...
查看完整题目与答案
参考解析：
知识点：
题目纠错 0
发布
创建自己的小题库 - 刷刷题