whenever
however
wherever
whether
第1题：
On traffic lanes where demand is strong and plane capacity is limited， the air rates will be （）and vice versa for traffic lanes where supply exceeds demand.
第2题：
yellowish flame
golden yellow flame
white flame
brilliant white flame
第3题：
A.salinity is abnormally
B.high steam demand is too
C.feed-water flow is low
D.water level is abnormally low
第4题：
salinity is abnormally high
steam demand is too high
water level is abnormally low
feedwater flow is low
第5题：
Receives saturated steam from the generating tubes
Serves as a reservoir of boiler feed water
Holds internal fittings for separation of moisture from steam
Collects steam exhausted from the turbines
第6题：
in the event of a flame failure
in the event of a stack fire
when the water level reach the crown sheet
when the feed pump discharge pressure drops to a preset minimum
第7题：
the former
the first
the latter
the last
第8题：
If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler, the cause may be ______.
A.high steam pressure in the boiler
B.abnormally high feed-water temperature
C.abnormally high boiler water temperature
D.steam demand exceeding feed pump capacity
第9题：
steam stop valve
dry pipe
feedwater system
generating tubes
第10题：
steam demand is high
salinity is high
safety valve simmers
burner flame is extinguished