Do you want to be Robin's friend? 你想成为Robin的朋友吗?试着给Robin写封信吧!
Dear Robin,
I want to be your friend. I am a ____. I'm ____ years old. I can ____.I can ____. But I can't ____. Can I be your friend? Please tell me! Thank you.
____
目前,中国吸烟人数已高达3.16亿,青少年吸烟率为6.3%,约有1 400万青少年烟民。同时,青少年吸烟呈现出低龄化趋势。吸烟对于青少年而言是一种( )
下列性质属于化学性质的是 ( )