A:1000个
B:2000个
C:4000个
D:500个
Name
Age
Height
Weight
Sarah
11
1.52 metres
35 kilograms
Liu Yun
13
1.60 meters
41 kilograms
Mike
10
1.65 meters
40 kilograms
参考句型: Sarah is . . . than Liu Yun. Liu Yun is . . . than Mike.
下列所示的四种情景中,属于光的直线传播形成的是( )