The Greens are from America. They are now 1 vacation in Beijing. This is their first visit to China. They are going to 2 in China for over two months. They want to visit some big cities, villages and famous places of 3.They want to learn some Chinese and taste some delicious Chinese food, 4.

    Mr. Green is a doctor. He will visit a famous 5 in Beijing. Mrs. Green is a school teacher. 6 teaches English in a middle school. She is going to visit some 7 and village schools. Their daughter, Jane is a middle school student. She studies 8 . She can speak a little Chinese. She would like to make some Chinese friends.

    They are going to 9 a lot of photos in China. When they come back to America, they can show them to their friends. They want Americans 10 more about China.

已知$\zeta ~B(n,p)$，且$E\left(\zeta \right)=7$,$D\left(\zeta \right)=6$，则P等于(     )

21世纪是海洋世纪，海洋经济日益重要，海权问题备受关注。阅读材料，回答下列问题。

材料一：我国古代农业文明发达，投入农业经营的人口占绝大多数，政府的赋税也主要来源于农业……无论是中国国民，或是政治精英，大多认为国家的利益不在海洋。

材料二：1912年12月，中华民国第一任海军总司令黄钟瑛病逝。有感于当时仍然严峻的海防形势，孙中山先生在其亲笔题写的挽联中发出了“伤心问东亚海权”的时代感叹。

——《近代中国海权问题的历史反思》

海军实为富强之基，彼美英人常谓，制海者，可制世界贸易；制世界贸易，可制世界富源；制世界富源者，可制世界即此故也

——孙中山《十年国防计划》

材料三：21世纪在我国实施海洋战略，具有现实必要性和可行性。中国是世界人口的头号大国，陆地空间不足，资源有限，海洋是今后可持续发展的最后空间。台湾问题的和平解决，必须依赖强大的海上力量作为后盾。中国自北向南，完全处在由岛链形成的半闭海状态，没有强大的海洋力量，就无法保证安全的出海通道。……海上通道和能源安全保障将是21世纪初叶我国面临的又一个新问题。

——《关于21世纪我国东部大海洋战略的思考》