Inspection第 34 / 80 题
Roof hatches on a bus that can be locked open:
a.Must always be locked open in warm weather
b.Should be removed
c.May be left open for ventilation but should be closed in bad weather
d.Never need checking
解析
Some buses have roof hatches that can be locked slightly open for fresh air. You may leave them open for ventilation, but remember that an open hatch reduces roof strength in a rollover and lets rain in. Close them when heavy weather threatens or when required.
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