A.狗听到很远处的人们手机的对话
B.狗听到火星发出的声音
C.狗听到人耳所不能觉察的某些高频率的声音
D.狗听到无线电波
答案:C
If you leave the club, you will not be _____ back in. [ ]
A. received
B. admitted
C. turned
D. moved
原始大气中没有[ ]
A.氧气
B.氮
C.甲烷
D.水蒸气