题干

我国准备有条件放开二胎生育。某大学生根据调查数据(政策改变后生育率为原生育率的1.4倍左右)设计了人口政策变化前后的人口增长数学模型(如图)。完成下题。

图中正确表达了政策改变后劳动力(15~60岁)变化(比重或人口数)的是(     )

A:模型1

B:模型2

C:模型3

D:模型4

上一题 下一题 0.0难度 选择题 更新时间:2019-10-05 07:37:54

答案(点此获取答案解析)

D

同类题3

阅读下面一段文字,完成后面的题目。

中国的茶俗以大众文化为主流,茶馆茶客盈门,就会完全足以说明这一点;而文人雅士在饮

                                                                                 ①

茶上另有讲究。历来的研究者在饮茶著述中,他们试图交给人们一种优雅的饮茶方式:即茶

                                                                     ②                                                     ③

社要雅致,茶叶需上品,入茶之水最好是甘冽的山泉;主宾身份情趣要相宜,或有诗文唱和,

                                            ④                               ⑤

书画助兴;或会心赏鉴;切勿主宾不解茶道和饮茶时佐以荤食;茶舍布置混乱,茶具粗劣,

               ⑥                   ⑦                                                                           ⑧

也是犯忌之事。

⑨

  • (1)为了表达简明,画线的词语有两处应该删除,序号分别是____ 和____ 
  • (2)画线的标点有两处错误,序号分别是____ 和____ 


同类题5

阅读理解

    A psychologist walked around a room while teaching stress management to the audience. As she raised a glass of water, everyone expected they'd be asked the “half empty or half full” question. Instead, with a smile on her face, she inquired. “How heavy is this glass of water?”

    Different answers are called out from the audience.

    She replied, “The absolute weight doesn't matter. It depends on how long I hold it. If I hold it for a minute, it's not a problem. If I hold it for an hour, I'll have an ache in my arm. If I hold it for a day, my arm will feel numb and paralyzed. In each case, the weight of the glass doesn't change, but the longer I hold it, the heavier it becomes.”

    She continued. “The stresses and worries in life are like that glass of water. Think about them for a while and nothing happen. Think about them a bit longer and they begin to hurt you. And if you think about them all day long, you will feel paralyzed and be incapable(无能力的)of doing anything.”

    It's important to remember to let go of your stresses. As early in the evening as you can, put all your burdens down. Don't carry them through the evening and into the night.

    Remember to put the glass down!”

    Comments:

    Aye Chan Aung-February 27, 2017 at 11:37am

    Short but valuable! It clearly teaches me how to deal with stresses.

    Nelson Malicdem-February 28, 2017 at 8:23 pm

    Wow! Thank the author and the one who submitted the article. I am experiencing a challenge when I read this. It gives me peace. What exactly is in the article is what I am doing. My burden actually paralyzes me without my knowing it. I put down the glass of water that I am holding. Thank you so much!