American people and British people speak the same language, their cultures are quite different.
A:Since
B:If
C:Although
D:Because
①铝片与硝酸汞溶液反应____.
②向Mg Cl2溶液中滴加氨水(NH3•H2O)生成Mg(OH)2沉淀____
下列名句名篇默写无误的两项是( )