更多"[单选题]The basic principle of pressur"的相关试题:
[单选题]One group of flight instruments operates on the principle of pressure differential to provide the pilot with speed, rate of climb or descent, and altitude, this group is referred to as the _______ instruments.
A.gyroscopic
B.pitot-static
C.altitude
D.attitude
[单选题]In general, extending large angle simple flaps increases lift and drag coefficient, decreases critical angle of attack, and _______ the ratio of lift and drag.
A.increases
B.does not change
C.decreases
D.is hard to determine whether increasing or decreasing
[单选题]Lift is proportional to the square of the airplane’s velocity. If an airplane’s speed is doubled, lift increases _______ .
A.two-fold
B.three-fold
C.four-fold
D.eight-fold
[单项选择]When did the latest round of increases begin
A. On Wednesday night.
B. On Friday.
C. On Thursday.
D. Three weeks ago.
[单项选择]If expected yield volatility increases, the price of a(n)（）
A. put-able bond will increase.
B. callable bond will increase.
C. embedded put option will decrease.
[单项选择]The velocity of escape is about ______.
A. 40,200 miles per minute
B. 25,000 kilometers per hour
C. 40,200 kilometers per hour
D. 25,000 miles per minute
[单项选择]设a="Visual Basic"，下面使b="Basic"的语句是
A. b=Left(a，8，12)
B. b=Mid(a，8，5)
C. b=Right(a，5，5)
D. b=Left(a，8，5)
[单项选择]（）the average age of the population increases, there are more and more old people to care for.
A. Unless
B. Until
C. As
D. While
[单项选择]
Adding 5 people to a 4 person team increases the communication channels by a factor of（）
[单项选择]Machines that use hydraulic pressure including elevators, dentist chairs, and automobile brakes.
A. exclude
B. excluding
C. include
D. are included
[单项选择]The simplestpolymers are created when pressure or heat causes small molecules alter slightly and link together in a long chain.
[单项选择]Will the pressure applied by environmentalists be enough to ______ the industrialized nations into using less fossil fuels
A. goad
B. gloat
C. gore
D. gibe
[单选题]The _______ displays the speed of the airplane through the air by comparing ram air pressure with static air pressure.
A.altimeter
B.airspeed indicator
C.vertical speed indicator
D.attitude indicator
[单选题]Flight level is a _______ of constant atmospheric pressure which is related to a specific pressure datum 1013.2 hpa.
A.standard
B.surface
C.height
D.number
[单选题]The airspeed indicator, altimeter, and vertical speed indicator all use static pressure, but only the _______ uses pitot pressure.
A.vertical speed indicator
B.altimeter
C.airspeed indicator
D.tachometer
[单项选择]The internal temperature of a large desert mammal is lowest______.
A) just before sunrise C) just after drinking
B) just after sunset D) in the middle of the day
A. The internal temperature of a large desert mammal is lowest______.
B. just before sunrise
C. just after sunset
D. just after drinking
E. in the middle of the day
[单选题]PRESSURE_DROP_AND_SPILL_VALVE活门的作用是:_
A.当高压燃油泵的出口压力过高时,该活门打开,释放一部分压力；
B.当燃油喷嘴的出口压力过高时,该活门打开,释放一部分压力；
C.当PRSOV的出口压力过高时,该活门打开,释放一部分压力；
D.当低压燃油泵 的出口压力过高时,该活门打开,释放一部分压力
[单选题]The lines of equal wind velocity are called _______ .
A.isobars
B.isotherms
C.isobaths
D.isogonic lines
[单选题]The relationship between velocity n, frequency ¦ and wave length l of electric wave spread is .
A.n=l/¦
B.n=lצ
C.n=¦/l
D.n=2¦/l
