触发性活动与折返机制的共同点为()
A.超速刺激可使其加速
B.具有频率逐渐增加的现像
C.可由适时的期前刺激或超速刺激诱发与终止
D.能被钙拮抗剂抑制
E.以上都不是
参考答案:D
— What time ________ I pick you up at your house tomorrow, sir?
— I haven't decided on the time. But I will call you. [ ]
A. may
B. can
C. will
D. shall
简述咨询人员要遵守的职业工作准则。