张小强上七年级时，十分散漫，头脑中没有纪律观念，经常迟到旷课。在课堂上也管不住自己，小动作不断，且把不交作业当成了家常便饭。针对他的这种情况，老师没有责罚，而是向他伸出充满温情和爱心的双手，在思想上给予他启迪。“学生，学生，就是学习人生。生活面前把持不住自己,不能分辨是非好坏，人生将一无所成。”面对老师的教诲，他开始认识到不应纵容自己，更不应因此荒废学业。从此张小强逐渐变得能自我约束了。后来他经过努力，考上了大学，并得到了去英国牛津大学留学的机会，最终获得了博士学位。张小强的经历告诉我们（  ）
①明辨是非善恶是十分重要的
②只有懂得什么是对的、什么是错的，才能加强自我约束
③青少年要努力铸就心中良知的标尺
④青少年只有在别人的帮助下才能走上正确的人生之路

    China Daily Sept 6, 2016

    Two days ago China held the G20 Leaders Summit (峰会) in Hangzhou. Leaders of the G20 members not only talked about the world issues, but also had a taste of Chinese culture.

    The logo of the summit shows Chinese architectural (建筑) culture. The logo looks like a bridge. “I got the idea from the old arched bridges (拱桥) at the West Lake,” said the designer Yuan Youmin. “Bridge link (连接) people and places in many different ways, just as the G20 brings east and west together.”

CCTV News Apr 20, 2017

    China has taken another step toward its goal of putting a space station into orbit around 2022, by sending its first cargo (货物) spacecraft Tianzhou-1 into space on Thursday evening.

    Atop a Long March-7 Y2 carrier rocket, Tianzhou-1 rose into the air from the Wenchang Space Launch Center in south China's Hainan Province at 7:41 p.m. After about 596 seconds, the spacecraft and rocket successfully separated into orbit.

下列哪种疾病不是传染病（　　）