发生电压崩溃时，（）装置可能拒动。
参考答案：低频减载
路由选择是OSI模型中( )层的主要功能。
A．物理
B．数据链路
C．网络
D．传榆
The Cognitive Approach gives importance to the learner' s active part in the process of using and learning a language, particularly in the learning of______.
A. rules of spelling B. rules of word-formation C. rules of pronunciation D. rules of grammar
