根据室内火灾温度随时间的变化特点,将其火灾发展分成初起、发展、猛烈、衰减四个阶段,下列有关说法正确的是() A. 初期阶段,火焰面积小、烟气少、热量低、传播慢 火灾扑救和人员疏散的最佳时机 B. 发展阶段,火焰面积增大、烟气增加、温度升高、传播加速 C. 猛烈阶段最危险,也最具破坏性,温度、气体对流强度、燃烧速度均达到峰值 D. 熄灭阶段因可燃物质燃烧将尽或消防扑救手段等因素使火场温度下降,气体对流减弱,但要防止“死灰复燃”
【简答题】第二节:完形填空(.共20小题每小题1分,满分20分) 阅读下下面短文,从后各题所给的,四个选项(A、B、C、D)中,选出最隹选项。 I was walking downa.darkly lit street late one,evening when I heard ambiguous screams coming from behind bushes.Alarmed,I 36 to lis...
【单选题】A 6 percent, annual coupon bond is currently selling at a premium and matures in 7 years. The bond was originally issued 3 years ago at par. Which one of the following statements is accurate in respec...
A.
The yield-to-maturity is less than the coupon rate.
B.
The face value of the bond today is greater than it was when the bond was issued.
C.
The bond is worth less today than when it was issued.
D.
The coupon rate is greater than the current yield.
【简答题】I was walking down a dimly (昏暗) lit street late one evening when I heard coming from behind bushes. , I slowed down to listen and panicked when I realized that what I was hearing were the sounds of a ...