Components of conventional CT include（）
A. computer system
B. laser camera
C. superconducting coil
D. RF generator
E. probe
查看答案
The bone structure that is rarely seen on a chest radiograph is（）
A. lumbar vertebra
B. sternum
C. rib
D. clavicle
E. thoracic vertebra
The basic conditions for the formation of X-ray plain film include（）
A. X-ray has penetrating power
B. There is a difference in density or thickness of the penetrated tissue
C. X-ray fluorescence
D. Photosensitive effect of X-ray
Which of the following is a major characteristic of meiosis I（）
A. Splitting of the centromere
B. Pairing of homologous chromosomes
C. Reducing the amount of DNA to IN
D. Achieving the diploid number of chromosomes
The purpose of contrast examination is to（）
A. increase the artificial contrast of organs and tissues
B. increase the density of organs and tissues
C. reduce the density of organs and tissues
D. increase the natural contrast of organs and tissues
E. change the structure of organs and tissues
微信支付 
支付宝支付