钛(Ti)因为具有许多神奇的性能而越来越引起人们的关注，常温下钛不和非金属、强酸反应，红热时，却可与许多常见非金属单质反应，钛是航空、军工、电力等方面的必需原料，地壳中含钛矿石之一种称为金红石(TiO2)矿石。目前大规模生产钛的方法是：
某反应2AB（g）⇌C（g）+3D（g）在高温时能自发进行，其逆反应在低温下能自发进行，则该反应的正反应的△H、△S应为（ ）
屈原在《离骚》中写到自己外在的着装：“____，集芙蓉以为裳。”
No. 1 Middle School
Don't run in the hallways
Don't bring food into the classroom.
Don't listen to music in class.
You have to wear a uniform.
No. 2 Middle School
Don't bring food into the classroom
Don't wear a hat in class.
Don't go into the classroom without the teacher.
No. 3 Middle School
Don't listen to music in the classroom.
Don't run in the hallways.
You have to wear sports shoes for gym class.
