由周边室向中央室的室间转运速度常数
A．XcB．XpC．κ10D．κ12E．Κ21
参考答案：E
The students are cleaning the room. _____ are cleaning the windows, _____ are cleaning the desks. [ ]
A. Some, others
B. Some, other
C. One, the other
D. One, others
交接班的质量标准是什么？
