A:月球并不做自转运动
B:月球自转周期与地球自转周期相同
C:月球自转周期与绕地球公转的周期相同
D:以上都错
公共汽车到站后,有 15 下车,有12人上车,上车后,车上人数和原来人数一样多,车上原有____人.
—Could you tell me_ it's polite to eat noisily in Japan, Kumiko?
—Sure! It's polite to do that. It means you like the food very much.