明装插座的安装高度一般应为（）。
A.0.3m
B.1.8m
C.1.5m
D.1.3m
参考答案：D
一个两位小数，保留整数是6．这个小数原来最大是______．
Please call my secretary to arrange a meeting this afternoon, or ______ it is convenient to you.
A. whenever B. however C. whichever D. wherever
