胡老师抱怨她班上的学生:“当他们违反纪律时,我对他们大喊大叫,但他们却越来越不像话!”对学生这种不良行为的增加可以用行为主义的( )理论观点来加以解释。
A. 正强化
B. 负强化
C. 给予惩罚
D. 消退
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我国第一艘核潜艇于()年下水。
A. 1970
B. 1971
C. 1972
水轮机的总效率是大于1的。
A. 正确
B. 错误
In form-based authentication, what must be included in the HTML returned from the URL specified by the element?()
A. a base-64 encoded user name and password
B. a form that POSTs to the j_security_check URL
C. an applet that requests the user name and password from the user
D. a hidden field that supplies the login-constraint used by the applicatio
在构造图的鞍部必须有两根等深度线平行穿过.
A. 正确
B. 错误