非屏蔽双绞线的符号表示为()
A.STB
B.FTP
C.STP
D.UTP
参考答案:D
—He got the first prize in a National Contest of Popular Music.
—Oh. That’s what he _____ for years.
A.had been expecting
B.has expected
C.expected
D.has been expecting
交感神经兴奋时可引起
A.瞳孔缩小
B.逼尿肌收缩
C.消化道括约肌舒张
D.孕妇的子宫平滑肌收缩
E.支气管平滑肌收缩