药物溶液加酸使成酸性后,则析出白色沉淀。具有这种性质的碱性药物为
A.苯巴比妥钠
B.司可巴比妥钠
C.异戊巴比妥
D.硫喷妥钠
E.维生素C钠
参考答案:A,B,D
When the future, many people will imagine a life high-tech devices.
A.thinking of, full of
B.thought about, full of
C.thought of, filled with
D.thinking about, filled with
传感器和被感应金属间的距离最大应为()。
A、2Cm
B、2mm
C、3mm