如图为漫画“小草的悲哀”.
上述问题主要发生于我国的( )
A:长江中下游地区
B:西北地区
C:东南沿海地区
D:东北和西南山区
—No, but I'm afraid __________ the strangers at night.
____My mum doesn't go to work on Sundays .
____She goes swimming on Sundays .
____I go to school on Mondays.
____Do you go to work on Mondays .
____Does Sam play football on Saturdays .
在探究凸透镜成像的大小与哪些因素有关的实验中: