【单选题】
With regards to a diesel engine crankcase explosion, the most violent is the()
(1) primary explosion
(2) secondary explosion
A . (1) only
B . (2) only
C . both (1) and (2)
D . neither (1) or (2)
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根据网考网移动考试中心的统计,该试题:
4%的考友选择了A选项
86%的考友选择了B选项
9%的考友选择了C选项
1%的考友选择了D选项