移动通信中分集技术主要用于解决（）问题。
A、干扰
B、衰落
C、覆盖
D、切换
参考答案：B
Not far from the shopping mall, there was a amazing garden, _____ the owner was a mean man refusing
every child to enter it. [ ]
A. its
B. whose
C. which
D. of which
以下哪项检查对该患者明确诊断意义不大
A．CTB．腰椎穿刺C．气脑造影D．脑血管造影E．脑电图
