食品和医药用蜡在()等方面的指标要求非常严格,为此必须加强后处理系统(汽提、干燥塔)的操作,以确保产品达到规格要求。
A、熔点
B、含油量
C、比色
D、气味和光安定性
参考答案:D
— I called you yesterday evening, but nobody answered the phone.
— Oh, I a walk with my parents at that time.
A.took
B.was taking
C.am taking
D.take
具有发散风寒功效的药物有()。