为防止食品发生酶促褐变,我们一般采用的方法有()、()、()、()。
参考答案:加热、调节pH值、加抑制剂、驱除或隔绝空气
男,11岁,因牙齿排列不齐要求正畸治疗,检查发现前牙拥挤。
如果拍片时发现颌骨体内边缘清楚的卵圆形致密影附着于下颌磨牙牙根部,周围可见环状密度减低的影像,应诊断为()
A.内生骨疣
B.根尖囊肿
C.真性牙骨质瘤
D.致密性骨炎
E.根尖肉芽肿
An 20-month-old with acquired immunodeficiency syndrome (AIDS) is seen in the clinic for health maintenance. Which of the following vaccines would the nurse anticipate administering to this toddler()
A. Diphtheria-tetanus-acellular pertussis.
B. Varicella.
C. Measles, mumps, and rubella.
D. Hemophilus influenza.