( )
A:溶液甲中一定含有Mg(NO3)2和Zn(NO3)2
B:若向固体乙中滴加盐酸有气泡产生,则固体乙是Mg、Zn、Cu、Ag
C:若溶液甲是蓝色,则溶液甲一定含有Mg(NO3)2、Zn(NO3)2和Cu(NO3)2
D:固体乙中一定含有Ag,可能含有Cu和Zn
江山如此多娇,引无数英雄竞折腰。惜秦皇汉武,略输文采;唐宗宋祖,稍逊风骚;一代天骄,成吉思汗,只识弯弓射大雕。俱往矣,数风流人物,还看今朝。
Bryant is my uncle. I know a lot ____(关于) him. He has a ____(儿子). He reads a lot in the city ____(图书馆). My uncle can ____(拼写) many English words. He is very ____(井井有条的). He ____(总是) puts his books in the bookshelf. I ____(必须) learn from him.He also likes animals. He has____(一些)pet ducks and two pet dogs. One dog is called ____(零) and the other is called One. My uncle is ____(他们的) good friend.
有人评论当今的局势说:“当今世界,巨人林立,日本是独角巨人,俄罗斯是生病的巨人,欧洲是缺乏凝聚力的巨人,美国是萎缩的巨人,中国是潜在的巨人……”这一评论说明当今世界政治格局的基本特点是( )