继承性，它们分别属于（       ）的继承。

阅读短文，回答问题．

2011年4月17日，被称为“空中猎鹰”的国产第三代战斗机歼10和我国最先进的第四代歼20隐身战机，在新中国航空工业60周年纪念日上再次亮相．以下是歼10战斗机的部分参数：

小明读完以上表格后发现有些参数看不懂，于是通过上网查阅了一些名词的含义．

爬升率：又称爬升速度或上升串，是各型飞机，尤其是战斗机的重要性能指标之一．它是指正常爬升时，飞机在单位时间内增加的高度，其计量单位为米/秒．

马赫：速度单位，1马赫等于1倍音速，等于340米/秒．

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请你帮助小明完成以下题目：

完形填空

     Different people have different ideas about time. People in the USA think that it is1to know the time. In cities in America, there are2in stations, factories and other buildings. Radio announcers (播音员) give you the correct time during the day. Most Americans also have watches with them3they go. They want to do certain things4certain time. They don't like to be late. They think everyone is supposed to do5on time.

    But time is not6important to everybody in the world. When you visit a country in South America, you will 7that people there don't like to rush. If you had an appointment with somebody, he could probably be late8he might not want to arrive on time.

    In South America, even the radio programs may not begin on time. The men on the radio may not think it is important to tell the exact9. People in South America think that clocks or watches are just machines. They think that you will10 a clock or a watch control (控制) your life if you do everything on time.