A:集气瓶
B:量筒
C:烧杯
D:水槽
2014年4月28日,国务院在重庆召开座谈会,就建设长江经济带做出了重要部署。生态安全关系长江经济带的可持续发展,目前长江上、中、下游各河段需要解决的生态和环境问题主要有( )
①水土流失 ②洪涝灾害
③凌汛 ④水污染
完形填空
Hello! My 1 is Jim Smith. My first name is 2, and Smith is my 3 name.4am 5 English boy. What's that over there? Oh, it's my 6. It's an 7 dictionary. I like8 very much. 9 is it? It's red. Can you 10 dictionary? Yes, D-I-C-T-I-O-N-A-R-Y.
关于“探究加速度与力、质量的关系”实验,下列说法中正确的是( )