①我国面临严峻的环境形势,大气污染严重 ②今后我国应把治理雾霾作为中心工作
③雾霾作为一种生态环境问题是可以治理的 ④我国应坚持科学发展观,走可持续发展道路
A:①②
B:①④
C:①③
D:③④
上生物实验课时,小刚发现他所用的显微镜是目镜、物镜上分别标有5倍和10倍字样,则他所用显微镜的放大倍数为( )
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.