单项选择题
单项选择题 MP3是目前最流行的数字音乐压缩编码格式之一,其命名中MP是指(12),3是指(13)。A.media playerB.multiple partsC.music playerD.MPEG-1 Audio
单项选择题 房间隔缺损患者,缺损1.8cm2。现17周妊娠。产科处理原则正确的是()
单项选择题 A.Because of the application of new technology and methods.B.Because of the decrease of government payments.C.Because of the increase in agriculture export.D.Because of Canada's dependence on agricultural import.