【C9】A．discriminateB．distinguishC．divideD．derive

You should be able to ______ right from wrong.A．perceiveB．distinguishC．sightD．observe

【C2】A．originB．dawningC．foundationD．derivation

【39】A．developB．differC．departD．derive

【C7】A．differB．comeC．rangeD．derive

The affix "-able" in the word "touchable" is a（n)A．derivational infix.B．derivational suffi

●设类Derived是类Base的一个子类，则Derived中（45)。（45)A．只有Base的属性B．只有Base的方法C．除Bas