中药的性状是指
A．药物的形状
B．药物的颜色
C．药物的气味
D．药物的滋味
E．药物的质地
参考答案：A,B,C,D,E
The doorbell had been ringing for several minutes before it ______.
A answered B had answered C was answering D was answered
5.00×10-5mol/L的氢氧化钠溶液的pH值应是
A．9.70
B．4.30
C．7.75
D．8.72
E．5.276.24
