我国食品卫生标准中鱼、肉类蛋白质腐败鉴定的化学指标是()
A.K值
B.二甲胺
C.三甲胺
D.挥发性盐基总氮
E.氨基酸态氮
参考答案:D
These seats are __________ for the elderly and disabled.
A.observed
B.deserved
C.preserved
D.reserved
慢性腹泻是指腹泻时间超过
A.1周
B.2周
C.1个月
D.2个月
E.3个月