电热膜是一种新型的电热器件，电热膜是在绝缘的聚酯薄膜表面，经过特殊工艺加工形成的一条条薄的导电墨线，导电墨线两端与金属导线相连，形成网状结构，其内部结构如图甲所示．电热膜取暖器工作时，室内空气温度升高是通过____方式增加空气内能的．将此电热膜接入电路，正常工作时金属导线中A、B处电流分别为I_A和I_B，则I_A____I_B（选填“＞”、“＜”或“=”）；导电墨线电阻随温度变化的关系如图乙所示，电热膜不会因厚度不均而出现局部过热的现象，原因是____．

阅读王晓刚的《净化网络“雾霾”需要理性精神》

       ①随着互联网的发展和普及，发帖、跟帖、评论、围观、“吐槽”等已经像我们的呼吸一样自然而然，不仅成了广大网民参与讨论社会公共议题的主要渠道，也成了我们自身生活方式的重要组成部分。然而，与言论的大解放如影随形的是，各种不文明的网络用语也随着“潘多拉盒”的打开而成泛滥之势。

       ②互联网无疑为人类的言论自由提供了迄今为止最为强大的技术支撑，同时也使人类言论自由观念更加深入人心。然而，对网络世界语言的乱象给予应有的关注也十分必要。进入网络世界，就会发现各种极端言论、偏激言论处处可见，而且越是“出格”就越容易赢得一片“点赞”叫好；对事件的争论也往往变得简单粗暴，乃至退化成偏激的人身攻击；各种粗俗言论将“国骂”从线下转移到了线上，甚至将网络“骂战”发酵成网络“约架”。这难道是我们期望的结果吗？

       ③在现实生活中，我们很难见到“网络版”的语言生态。在我们最朴素的道德判断中，也没有多少人希望自己的生活中充斥着诸如此类的低俗语言，无论是对亲人、朋友、同事，还是对待陌生人，我们都希望保持基本的尊重、礼貌和教养。几乎没有人希望低俗的网络语言从“虚拟”变成自己所处的“现实”。然而，现实中的自律意识，一旦上网便消失得无影无踪。

       ④显然，人们对洁净的语言有着线下和线上的双重标准，而且到目前为止，网民们还没有像珍惜清洁的空气那样珍惜自己以及自己的父母、孩子、朋友共处的网络空间。而要深刻地改变这种观念，人类还需要一定的时间。但如果回顾大自然的“报复”和人类“环保意识”的觉醒、深化和普及过程，我们也会坚信：网络环境污染的严重后果，最终将会把网络环保意识强制性地灌输到网民的头脑之中。

       ⑤但我们不能坐等这种后果发生之后才姗姗来迟地觉醒，而要从现在起就付出努力，推动网络环境向清爽健康的方向发展。正如德国学者埃利亚斯在《文明的进程》一书中所言，每一种文明的表现绝非天然如此，而是一个不断演化的过程，是历经数百年心理积淀、规范的结果。因此，我们不能等待一种结果，只能付出努力去推动。

       ⑥“亡羊补牢，未为迟也。”如果我们从现在就开始付出努力，或许几十年后互联网世界将回馈给我们一片“蓝天”。要知道，我们在“十面霾伏”面前，可以把责任推卸给“排污大户”，但在网络世界，我们都是内容的生产者和发布者，都是形成网络语言生态的一分子。因此，要还网络语言环境的那一片“蓝天”，需要每个网友从自身做起，从管住自己的“嘴巴”做起。

                                                                                                                                                           （选自《光明日报》2016年5月14日，有删改）

根据句短文理解，完成下列各题。

       A group of people asked this question to a group 4-to-8-year-old children. “What does love mean?” The answers were surprising. The children would answer like they did below.

  “When my grandmother hurt her knees (膝盖), she couldn't bent (弯腰) over and paint her toenails (脚指甲) any more. So my grandfather does it for her all the time, even when his hands hurt too. That's love.”

                                                                                                                                                                   Rebecca–age 8

 “Love is when someone hurts you. And you get so mad but you don't shout at them because you know it would hurt her feelings.”

                                                                                                                                                                  Samantha–age 6

  “Love is what makes you smile when you're tired.”

                                                                                                                                                                  Terri–age 4

 “I let my big sister pick on (捉弄) me because my mum says she only picks on me because she loves me. So I pick on my baby sister because I love her.”

                                                                                                                                                                  Bethany–age 4

  “I know my older sister loves me because she gives me all her old clothes and has to go out and buy new clothes.”

                                                                                                                                                                  Lauren–age 4

   “Love is when Mommy gives Daddy the best piece of chicken.”

                                                                                                                                                                   Elaine–age 5

   “My mommy loves me more than anybody. You don’t see anyone else kissing me to sleep at night.”

                                                                                                                                                                  Clear–age 5

   “You really shouldn't say ‘I love you’ unless you mean it. But if you mean it, you should say it a lot. People forget.”

                                                                                                                                                                  Jessica–age 8

如图是尿液形成示意图。下列说法错误的是（　　）

The number of students in our school _________ more than 2000.