目前最常用的抗麻风病药是
A．利福平
B．氯法齐明
C．氨苯砜
D．醋氨苯砜
E．苯丙砜
参考答案：C
—Do you have any idea why the engineer resigned?
—No. In fact, everyone is ____about it.
A．doubtful
B．curious
C．enthusiastic
D．annoyed
1960年，谁将诸多市场营销因素概括为产品、定价、分销和促销四类？
