莱菔子降低人参的补气作用，属于（）
A.相须
B.相使
C.相杀
D.相恶
E.相反
参考答案：D
______, ______ many boys, Jack like playing football.
A．In a fact; in common with
B．In fact; as
C．In the fact; like
D．Actually; in common with
互调干扰中（）干扰最严重。
A、五阶互调
B、三阶互调
C、中频互调
D、镜相互调
