“简体字、繁体字，都是中国字”“从今以后，你中有我，我中有你”——海峡两岸专家学者赋诗献歌，共表两岸浓情。表明（    ）
①两岸同胞血脉相连、文化薪火相传  
②实现祖国统一，是海内外中华儿女的共同心愿
③两岸实现统一已没有阻力          
④加强两岸文化交流，有利于促进祖国统一 

阅读下面短文。从短文后所给的A、B、C三个选项中选出最佳选项。

    Light travels at a very fast speed. It is about a million times 1 than the speed of sound. You can get some idea of this 2 by watching the start of a race (赛跑). If you stand some distance away from the starter, you can see smoke from his gun before the sound gets to your 3

    This great speed of light4some strange facts. Sunlight 5about 8 minutes to get to us. If you look at the light of the moon tonight, 6 that the light rays (光线) left the moon 1.3 seconds before they got to you. The nearest star is so 7 away that the light which you can see from it tonight started to 8 towards you several years ago. In some cases, the light from one of tonight's stars had started on its journey to you before you were born.

    So, to be exact, we can't say, "The stars are shinning 9." We have to say instead, "The stars 10 pretty. They were shining several years ago, but their light has only just got to the Earth."

随着时间的推移，英国一点点发生变化，把脸转向欧洲，而背却开始对着帝国。这时英国对自身国际地位的重新界定，标志着在大约500年中一个历史性的大转变。这里的大转变指（    ）