【单选题】在采用温升式火警探测器中,其报警整定值一般每分钟升高____°C时发出报警信号。
【单选题】When is the National Day in China?
A.
on 4th Thursday of June
【简答题】When is National Day?
【单选题】在采用温升式火警探测器中,其报警定值一般每分钟升高————℃时发出报警信号。
【简答题】When is the National Proposal Day?
【单选题】在采用温升式火警探测器中,其报警整定值一般______时发出报警信号。
【简答题】When is the National day?
【单选题】When National Day is ______, everyone in our class is busy in planning how to enjoy a seven-day holiday.