下列对东北三省气候及降水的描述中不正确的是（　　）

下列是二元一次方程的是（　　）

在2015年11月27日至28日召开的中央扶贫开发工作会议上，***强调：要坚持精准扶贫、精准脱贫，确保到2020年所有贫困地区和贫困人口一道迈入全面小康社会。材料体现了（    ）

①实现共同富裕是一个过程                                         ②中国特色社会主义的根本原则

③在不同的发展阶段，共同富裕有不同的内容         ④我国即将彻底消除收入差距过于悬殊的现象

读拼音，写汉字。

dà  xuě  ____ qīnɡ sōnɡ ____  ɡāo jié____  dài dào ____   

    I went hiking to a mountain with my friends last summer． It was a good trip at the beginning but something unexpected happened on the half way．

    One of my friends, Mike, suddenly felt a terrible pain in his stomach and he couldn't move any further． Nobody knew what to do． One girl tried to call her mum with her mobile phone but there was no signal in the mountain area． Luckily I brought medicine with me． After Mike took some, he felt much better． We walked on, and then we all enjoyed ourselves on the top of the mountain.