音高(Pitch)
参考答案:
用一秒钟的振动数来表示。频率次数多者音高,频率次数少者音低。将每秒振动440次的声音定为“a”,是目前国际通用的标准音。
Anne's father would not()to her marrying a foreigner.
A.content
B.consent
C.approve
D.choose
患者,男,25岁,近两日腹痛,里急后重,便下粘滞白冻,喜暖恶寒,胸脘痞闷,诊断为()
A.急性泄泻偏于寒湿
B.急性泄泻偏于湿热
C.寒湿痢
D.湿热痢
E.慢性泄泻