A:表明我国公民都能捍卫国家的主权和利益
B:自觉履行维护了国家利益义务
C:履行了维护国家统一和民族团结的义务
D:行使了维护国家利益的权利
在硝酸铜、硝酸锌、硝酸亚铁混合溶液中加入铝粉,充分反应后过滤.
①若滤纸上有两种金属,则这两种金属是____(填化学式).
②若滤液中只有一种溶质,则这种溶质是____(填化学式).
根据阅读内容选出正确选项。
This is a picture of my uncle. He likes math. He works in a bank. He helps the bank use their money well. He likes working with numbers. He goes to work by car, but sometimes he walks. My aunt is an engineer. She likes drawing pictures. She works in a big company. She designs computers. She goes to work by bus.
3×2=____2×2=____1×4=____ 4×2=____