加机组，并执行后续3.5小时（含）以内航班的飞行机组在加机组航班按照正常机组配餐标准给予配餐。
参考答案：错
Parents should take seriously their children’s requests for sunglasses _______ eye protection is necessary in sunny weather.
A．because
B．through
C．unless
D．if
《煤矿安全规程》规定，巷道净断面必须满足什么需要？
