材料一：2012年4月11日菲律宾海军士兵持枪登上我黄岩岛海域作业，引发了南海对峙事件．

材料二：黄岩岛位置图：（如图1）

黄岩岛，位于北纬15°07′，东经117°51′．距西沙群岛约340海里，距中沙环礁160海里，距离广州500多海里，距离菲律宾苏比克港约130海里．

向大家介绍这是我的老师，应该是：（   ）

____这叫做比例的基本性质。

    Jenny and Li Ming watched Bob play basketball this evening. They arrived at the gym(体育馆)at 6：30. Bob's team played with the Orange Team. Everyone played hard! Jenny and Li Ming had fun at the gym. They yelled for Bob's team. Finally, Bob's team won. They were very happy.