— They're books.
A:Are these English books?
B:Are those English books?
C:How do you spell it?
D:What're these in English?
传说中的部落联盟首领推举产生的办法,后人称之为“____”。
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