初夏时节,气温渐渐升高了。下午连续上了两节数学课,闷热的空气加上枯燥乏味的数学方程式,足以催人入眠。数学老师循循善诱地在讲台上讲解,台下已经有几位同学打瞌睡了。不知谁起的头,把草稿纸当扇子扇,于是,教室里便响起了纸张扇动的沙沙声。“哎,你们干吗?”数学老师转过身来,用粉笔戳着讲台发出“梆梆”的声响。 Early summer season, the temperature gradually increased. Two consecutive math lessons in the afternoon, the hot air plus boring mathematical equations, enough to make people sleep. The math teacher follows the example on the podium, and some of her classmates have fallen asleep. I do not know who started, the scratch paper fan, then, the classroom sounded the rustle of paper fan. “Hey, what are you doing?” The math teacher turned around and poked the podium with a “” sound.