对原发性肝癌早期诊断最有价值的是
A．甲胎蛋白测定B．癌胚抗原测定C．B超检查D．CT检查E．腹部平片
参考答案：A
—How do you know that he has bought ___ MP5?
--- He wrote ____ e-mail to me yesterday.
A．a, an
B．an, an
C．a, the
D．the, a
既能祛风解表，又能胜湿、止痛止痉的药物是（）
A.荆芥
B.防风
C.香薷
D.紫苏
E.桂枝
