星期三的上午，贲老师给我们上了一堂别开生面的科技活动课———检验香烟的毒性。实验由我和姜瑾钰主持。首先，我把准备好的九支“一品梅”香烟分别剥去包装纸。接着分成数量不等的烟丝，半支、一支、一支半、两支半、四支，并分别将它们放入五只同样的透明杯子内。然后姜瑾 On Wednesday morning, teacher Ben gave us a special science and technology activity class --- to test the toxicity of cigarettes. The experiment was presided over by me and Jiang Jinyu. First of all, I peeled off the wrappers separately from the nine “Pinto” cigarettes I prepared. Then divided into a number ranging from tobacco, half a branch, one and a half, two and a half, four, and respectively put them into the same five transparent cup. Then Jiang Jin