能够使紫甘蓝水变绿的物质，称为____。

如图反映四个国家的人口出生率和死亡率．据此回答下题．

2016年9月，以“构建创新、活力、联动、包容的世界经济”为主题的G20峰会在杭州召开，中国备受世界瞩目，这显示我国（    ）

①国际地位不断提高     ②主导经济全球化发展

③综合国力显著增强     ④已迈入发达国家行列

把下面的图片与所给的描述对号入座。
A        B          C 
D                E
____ He is of medium height and build, with two small eyes. He is a pop singer. And he likes playing basketball very much. He is very popular with young people.
____ He is short and of medium build. He has short black hair. He is a funny actor.
____ She is heavy. She has short brown hair. She always wears glasses. She sings very well.
____ He is very tall and has short black hair. He is a basketball player, and he plays it very well. Now he is a college student in Shanghai Jiaotong University.
____ She is thin, with long black hair and big eyes. She is a movie star. She is in the play "Palace", and she is very popular with young people.

***在《星星之火，可以燎原》中说：“他们这种理论的来源，主要是没有把中国是一个许多帝国主义国家相互争斗的半殖民地这件事认清楚。”为此***明确提出了 （ ）