网状防护装置的网孔不得大于（）。
A.30mm×50mm
B.40mm×50mm
C.50mm×50mm
D.50mm×60mm
参考答案：C
There are 6 MP3 players in the box. Two are made in Japan and _____ are made in China. [ ]
A. other
B. the others
C. another
