电空位操作时应将空气制动阀的转换键置()。
参考答案:电空位
—Don't forget to post the letter, will you?
— I __________ it. [ ]
A. would post
B. had already posted
C. have already posted
D. was posting
记忆训练方法中,"如要记住电话号码‘87335100’,可以想象‘8个73岁的老人爬3座山去看望5个100岁的老和尚’"属于()
A.兼容
B.视觉想像
C.自身参照
D.精细加工
E.首词记忆法