单选题High-speed operation and rough handling of covers are dangerous.（）A高速操作和野蛮开关舱是危险的B高速和野蛮操作舱盖是危险的C低速操作和野蛮开关舱是危险的D低速和野蛮操作舱盖是危险的
单选题
High-speed operation and rough handling of covers are dangerous.（）
A
高速操作和野蛮开关舱是危险的
B
高速和野蛮操作舱盖是危险的
C
低速操作和野蛮开关舱是危险的
D
低速和野蛮操作舱盖是危险的
参考解析
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