细菌的菌落总数的食品卫生学意义是将其作为什么的标志()
A.食品中的菌数
B.食品中细菌种类
C.食品等级
D.食品清洁状态
E.以上都不对
参考答案:D
30. After he had recovered from his injury, he caught a squirrel (松鼠) and raised it as a pet. Soon he ______ home snakes and other creatures from the woods near his school.
A.was bringing
B.is bringing
C.has brought
D.had brought
水的基本表现形式包括流水、落水、静水和()等。