题干
He is the boy ______ likes playing basketball very much.
A：which
B：who
C：whom
D：whose
答案(点此获取答案解析）
B
He is the boy ______ likes playing basketball very much.
A：which
B：who
C：whom
D：whose
分子中化学键断裂时需要吸收436 kJ的能量②1 mol C1