问题
单项选择题
垂直鞭状天线的方向性图的形状是()。
A、圆形
B、“8”字形
C、椭圆形
D、矩形
答案
参考答案:B
垂直鞭状天线的方向性图的形状是()。
A、圆形
B、“8”字形
C、椭圆形
D、矩形
参考答案:B
Jogging(慢跑)became popular about twenty years ago and has been a favorite way of keeping fit for lots of people. People like to do it. Both teenagers(青少年)and people in their seventies or eighties can jog. They can jog anywhere—around college campuses(校园), around houses or in parks. Jogging is good for health. It is good for lungs and hearts. It is easy and convenient(方便). 根据短文内容,填写下列表格。(每空一词,10分)
|