A:不可能收集到一瓶CO2,因为CO2可溶于水
B:选择B,C两种装置,导管b接导管d可收集到一瓶CO2
C:选择B,C两种装置,导管c接导管d可收集到一瓶CO2
D:选择A,B两种装置,导管a接导管b可收集到一瓶CO2
化学实验室有四个药品橱分类存放药品情况如下:现新购进了一瓶碳酸钠,应存放的药品橱是 ()
We have a big playground in our school .We all like to 1 games 2 after school .It's Friday .We have only two classes 3 the afternoon . 4 school is over(结束的),a lot of students go to the playground quickly. The boys of Grade Two often 5 soccer. The girls like 6 them playing .Soccer is their favorite sport . Their teacher Mr Li also 7 football. Li Ming , Li Lei and Wei Fang are students of Grade One .They sometimes play 8 the students of Class Two. It’s half past five 9 . It's time 10dinner . My father is waiting for me at the school gate .