According to the different frequencies, the sound can be classified into ( ). A: audio sound B: ultrasonic wave C: infrasonic wave

For breast cancer diagnosis, which of the following methods is the<br/>most effective? () A: Infrared B: Ultrasonic C: MRI D: Mammography

Which<br/>of the following techniques is not commonly used for taste compounds<br/>extraction? () A: Solvent extraction; B: Headspace extraction; C: Ultrafiltration; D: Ultrasonic technique

The application scope of ultrasonic technology in obstetrics are（） A: prenatal diagnosis of fetal malformations B: genetic ultrasound C: intrauterine management of high-risk pregnancy D: interventional ultrasound and intrauterine therapy

Which one does not belong to medical images: A: MRI图像 B: CT图像 C: 超声多普勒图像 (Ultrasonic Doppler) D: 紫外图像 (Ultraviolet image)

Currently, the frequently used methods for ampoule cleaning mainly include:( ) A: the alternating pressurized water and gas jet B: ultrasonic washing C: water-dumping washing methods D: Washing-free ampoule

The wrong statement about the ultrasonic manifestations of gout is ( ) A: high sensitivity to synovial crystallization B: tophi stone has high specificity C: high specificity of bone erosion D: low sensitivity to bone erosion