A：
B：
C：
D：
下图漫画中的人大代表用“微博”（“微型博客”的简称谐音作“围脖”）来传递民意的做法反映了（ ）
I know you're busy these days, but you'd better ___________ off today's work till tomorrow.
——Though radio and television are ____ popular in the world today, I think the TV is ____ useful.——Of course, on TV we can see and hear what is going on home and abroad.
等质量的氮气和氧气中，所含分子数较少的是____
6 C
12.01
7 N
氮
14.01
8 O
氧
16.00
，
，则
（ ）
