【简答题】四缸发动机的作功顺序一般是__--__--__--__。
【简答题】四缸发动机的作功顺序一般是__--__--__--__。
【单选题】Premature infants are
A.
newborn with gestational age over 37 weeks and less than 42 weeks and weighing more than 2500g
B.
newborns of gestational age greater than 37 weeks and weight less than 2500g
C.
newborns with gestational age greater than 37 weeks and weight greater than 2500 g
D.
newborns under 37 weeks of gestational age
E.
newborns of gestational age of 37 weeks
【单选题】模板设计中,新浇混凝土的荷载,通常可按()kN/m 3 计。
【单选题】What do Israeli researchers' findings show?
A.
Mothers who breast-feed their babies have a harder time falling asleep.
B.
Mothers who sleep with their babies need a little more sleep each night.
C.
Sleeping patterns of mothers greatly affect their newborn babies' health.
D.
Sleeping with infants in the same room has a negative impact on mothers.
【单选题】关于变压器,下述说法中错误的是( )
A.
对电压进行变比,升高电压满足大容量远距离输电的需要,降低电压满足用电的需求
B.
变压器不仅可以对电压大小进行变换,也可以对功率大小进行变换
C.
当变压器原边与发电机直接相连时,(发电厂升压变压器的低压绕组)变压器原边的额定电压应与发电机额定电压相同
D.
对降压变压器来说,其副边绕组额定电压一般应为用电设备额定电压的1.1倍
【单选题】关于变压器,下述说法中错误的是( )
A.
对电压进行变化,升高电压满足大容量远距离输电的需要,降低电压满足用电的需求
B.
变压器不仅可以对电压大小进行变换,也可以对功率大小进行变换
C.
当变压器原边绕组与发电机直接相连时(发电厂升压变压器的低压绕组),变压器原边绕组的额定电压应与发电机额定电压相同
【简答题】模板设计中,新浇混凝土的荷载,通常可按( )计。
【单选题】模板设计中,新浇混凝土的荷载,通常可按()KN/m3计。