多项选择题 Suppose you want to promise that won’t happen again when making an apology, which of the following expressions can you use? ( )
单项选择题 条件刺激和非条件刺激多次匹配后，条件刺激在大脑皮层的兴奋灶与非条件刺激的兴奋灶可以形成暂时性联系，这是对（ ）生理机制的解释。A.经典条件反射B.操作性条件反射C.朝向反射D.防御反射
单项选择题 Entertaining the person with an after-work drink is helpful in improving your relationship.A.对B.错