骨料堆积密度试验结果计算应精确至（）kg／m3.
A、1
B、5
C、10
D、100
参考答案：C
Many students are playing sports on the playground. are playing soccer; are running and
jumping. [ ]
A. Others; the others
B. Some; other
C. Some; others
D. One; the other
普通灯具与可燃物之间的安全距离在不应小于（）m。
A.0.3
B.0.5
C.0.7
D.1.2
