题干
You ______a teacher. I ______ a student. My sister ______a student, too.
A：am; is; are
B：is; are; am
C：are; am; is
D：are; is; is
答案(点此获取答案解析）
C
You ______a teacher. I ______ a student. My sister ______a student, too.
A：am; is; are
B：is; are; am
C：are; am; is
D：are; is; is
Cu+Cu2+(未配平)。
气体产生；③溶液呈蓝色。
