消极归因就是把成功归因于自己运气好等外部的、不稳定的、不可控的因素。
参考答案：对
Tom has to go to school on foot every day, _____? [ ]
A. isn't he
B. weren't he
C. doesn't she
D. doesn't he
恶性肿瘤累及的牙一般应：（）
A．尽量保留
B．在肿瘤手术前拔除
C．与肿瘤一并切除
D．在肿瘤放疗后拔除
