单项选择题 足厥阴肝经与手太阴肺经交接于（ ）Where is the liver meridian of foot-jueyin connected with lung meridian of hand-taiyin?A.HeartB.ChestC.LungD.AbdomenE.Stomach
单项选择题 电波在自由空间传播时，载波频率为1800MHz时其衰耗为100 dB ，当载波频率采用900MHz时，则传输衰耗为（ ）dB。A.90B.94C.102D.106
单项选择题 To be offered a "gift" of one penny is like being invited to dinner and offered one single pea (tastily cooked), and nothing else.A.对B.错