___________ books do you have?[ ]
A. How much
B. How are
C. What's
D. How many
答案:D
下面的图是超市中用来识别货物和价格的条形码,它就是黑白相间的条纹,当扫描仪照射它时,黑条纹将光______(选填“反射”或“吸收”),白条纹将光______(同上),再通过电脑解码就可以了.
生脉散的功用是()
A.益气养阴,复脉定悸
B.清热生津,益气和胃
C.滋阴养血,生津润燥
D.益气生津,敛阴止汗
E.滋阴润肺,益气补脾