【简答题】吸收过程的推动力为______。 (A)气相浓度与液相浓度之差 (B)气相实际浓度与平衡浓度之差 (C)气相温度与液相温度之差 (D)气相实际温度与平衡温度之差
【单选题】麻黄与桂枝、附子与干姜、石膏与知母的配伍属于( )。
【单选题】下列物质的转变,不能由前一种物质和其他一种物质反应而得到后面一种物质的是( )
【单选题】The area of velocity versus time graph is
【单选题】下列物质除杂(括号内物质为杂质)所用试剂正确的是 物质 试剂
A.
Na 2 SO 4 溶液(NaBr) Cl 2
D.
CO 2 (HCl) 饱和Na 2 CO 3 溶液
【简答题】在CO、C、H 2 、CO 2 四种物质中,哪种物质具有不同于其他三种物质的特点 _________ .
【单选题】The slope of velocity versus time graph is
【多选题】What is the difference between velocity and speed?
A.
Velocity is a vector, and speed is a scalar.
B.
Speed is a vector, and velocity is a scalar
C.
Speed states only a magnitude, and velocity states a magnitude and direction.
D.
Velocity states only a magnitude, and speed states a magnitude and direction.