What _____________ you like for lunch?[ ]
A. could
B. would
C. will
答案：B
日月星辰东升西落现象的形成原因是[ ]
A、日月星辰都绕着地球转
B、地球绕太阳自西向东公转
C、地球自西向东自转
D、地球公转时，地轴是倾斜的
怎样降低频闪效应？
