以下哪一项是口腔流行病学中最常用的一种方法()
A.龋病流行病学调查
B.口腔健康状况调查
C.口腔疾病监测
D.口腔疾病流行趋势调查
E.口腔疾病病例一对照研究
参考答案:B
气逆证的症状是()
A.少气懒言,倦怠乏力,头目眩晕
B.二便失禁,骨瘦痿厥,遗精
C.头痛眩晕,昏厥,呕血
D.纳呆,脘腹胀满,大便涩滞不畅
E.少气懒言,大便溏泄,腹部有坠胀感,脱肛
All the holds which are to take cereals in bags must be so cleaned that thay meet the requirements of the().
A.local agent
B.crgo surveyor
C.accident investigator
D.general average adjuster