选项
含杂质的物质
试剂
除杂方法
A
C2H4(SO2)
NaOH溶液
洗气
B
C6H6(Br2)
Fe粉
蒸馏
C
C6H5NO2(HNO3)
分液
D
C2H2(H2S)
CuSO4溶液
Friday, May 6
arrive in Beijing
Saturday, May 7
go to Tian'anmen Square
Sunday, May 8
go to the Palace Museum
Monday, May 9
go to the Great Wall
Tuesday, May 10
shop in Beijing
Wednesday, May 11
go home
Li Ming,Danny,Jenny and Mrs. Li will go on a trip to Beijing. Look!Here's their plan.
They arrive in Beijing on Friday,May 6.
①强化权力机关的法律监督 ②加强和规范党内政治生活
③完善我国的行政监督体系 ④提高党的执政水平和执政能力
核酸是生物的遗传物质,ATP是生命活动的直接能源,下列有关核酸和ATP的叙述正确的是( )