气压试验时,介质的温度()15℃(干燥、清洁的空气、氮气、惰性气体)。
A、大于
B、小于
C、等于
D、任意
参考答案:A
Which of the following drugs may be abused because of tolerance and physiologic dependence
A.Lithium (Lithobid) and divalproex (Depakote).
B.Verapamil (Calan) and chlorpromazine (Thorazine).
C.Alprazolam (Xanax) and phenobarbital (Luminal).
D.Clozapine (Clozaril) and amitriptyline (Elavil).
广告代理制的广告运作机制()
A、以广告公司为核心
B、以广告主为核心
C、以广告媒介为核心
D、以广告受众为核心