影响合理用药的因素有：

A．医师、药物和社会因素

B．药师、药物和环境因素

C．护师、药物和政策因素

D．人员、药物和外界因素

E．患者、药物和体制因素

A rhetorician who spends so much of his time studying the famous ------- of logic is more than likely to produce a few self-evident statements of his own.

A．(A) self-knots

B．(B) paradoxes

C．(C) twists

D．(D) tautologies

E．(E) platitudes