检查表浅器官选用下列哪个频率() ["A.2.0~2.5MHz","B.2.5~3.0MHz","C.3.0~3.5MHz","D.3.5~5.0MHz","E.7.5~10.0MHz"]
对横纹肌肉瘤目前治疗主要用________。
由于入射波束与曲面相互作用造成伪像并产生声影,称为() ["A.幻影伪像","B.边缘伪像","C.“彗星尾征”伪像","D.振铃伪像","E.混响伪像"]
眼眶及其内容物病程的多样和复杂性,主要有________、________、________、________、________等五类。
超声换能器将________能转换成_________能() ["A.机械,声","B.电,机械能","C.热,声","D.任意能,电","E.电,热"]
眶骨壁破坏多见于________,无名线消失提示________或________。