苍术炮制后,燥性降低的原因是()
A.挥发油含量降低
B.黄酮含量降低
C.皂苷含量降低
D.生物碱含量降低
E.脂肪油含量降低
参考答案:A
— Is it good to look up every new word when I come across it in reading?
—No,you _____,because you are likely to guess the meaning from the context,
A.don't have to
B.shouldn't
C.can't
D.mustn't
打印机是一种常用的输出设备,除了有些高速激光打印机使用SCSI接口与PC机相连外,打印机一般都使用并行接口与PC机相连,但近年来使用 【18】 接口的情况越来越多。