题目

To help a friend solve the problem troubling him,      .        A．a friend should be made known of his difficult situation        B．a man should be equipped with the kind of knowledge required        C．nothing is better than offering of knowledge required        D．keeping one’s promises is most important 答案：B 解析: 略高等动物神经调节的基本方式是（ ）A．运动B．反应C．兴奋D．反射