一块砖的周长是4.6____,表面积约是4.24____,这块砖占有空间的大小是0.48____.
去北京香山观赏“香山红叶”,旅游者宜( )
①选择春光明媚的季节去观赏
②选择秋高气爽的季节去观赏
③宜远眺或俯视方能体会“满山红遍,层林尽染”的佳境
④宜近观才能看出“红叶满山,宛若彩霞”的效果
— How many students are there in your school?
— students, I think.