如图所示实验中，①、④为用紫色石蕊溶液润湿的棉球，②、③为用石蕊溶液染成紫色并干燥后的棉球．下列能说明CO₂密度大于空气且能溶于水的现象是（　　）

完形填空

    The Spring Festival is the Chinese New Year's Day. It usually 1 in January or February. Everyone in 2 likes the Spring Festival very much. When Spring Festival comes, I usually 3 my parents clean our house and do some 4.  5   that day,  6 eats 7, New Year's cakes and some other food. But I 8 dumplings best. We usually 9 dumplings and  10  TV. I like the Spring Festival.

右图为“福州市首届中学生现场法制漫画比赛”中的一幅获奖作品。对此，下列说法中正确的是（）

①吸毒与上网是不良嗜好   ②吸毒严重摧残人的身心健康 
③吸毒有罪，贩毒违法     ④珍爱生命，拒绝毒品