第13题: [单项选择]What does "internal mechanism" ( Line 3, Para. 3) mean A. Secret machine. B. Mental processes. C. Overt system. D. Mechanic operation. 参考答案:B 答案解析:[试题分析] 词义题。通过上下文可以得知答案。
[详细解答] 见Para.3第一句because从句we have to postulate some set of processes,some i