题干
The man ________ was a friend of mine.
A：you just talked
B：who you just talked to
C：whom you just talked
D：which you just talked to
答案(点此获取答案解析）
B
The man ________ was a friend of mine.
A：you just talked
B：who you just talked to
C：whom you just talked
D：which you just talked to
+ 6H2O=== 4Fe(OH)3↓+ O2↑+8 Na+，则下列说法正确的是