【简答题】根据学过的课文,判断正(T)误(F) The Earth is a planet and it goes around the Sun.Seven other planets also go around the Sun.None of them has an environment with air,so people and things cannot grow.The Sun and its...
【单选题】When you become frightened, many physical changes occur within your body. Your heartbeat and responses quicken your pupils dilate (扩大) and______more light.