题干
A friend is a person ______ you know very well and like very much.
A：who
B：which
C：whose
答案(点此获取答案解析）
A
A friend is a person ______ you know very well and like very much.
A：who
B：which
C：whose
Al2O3+2Fe这一反应原理来焊接钢轨．则反应物中具还原性的物质是