在线网课学习课堂《Diagnostic Ultrasonography（中国医大 ）》单元测试考核答案.docx

注：不含主观题 第1题 单选题 (10分) The wrong statement about the formula is ( ) A The higher the frequency, the shorter the wavelengthB The lower the frequency, the shorter the wavelengthC The worse the penetration, the higher the discriminationD the better the penetration, the lower the discrimination 第2题