更多"[单选题]Pressure gradient and _______ "的相关试题:
[单项选择]
An internet is a combination of networks connected by (1).When a datagram goes from a source to a(2)，it will probably pass many (3)until it reaches the router attached to the destination network. A router receives a (4)from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available (5)is the optimum pathway?
空白（1）处应选择（）
A. modems
B. routers
C. switches
D. computers
[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 synoptic chart _______ the areas of low pressure, the areas of high pressure where precipitation is falling, and all other weather conditions across the country.
A.shows
B.tells
C.gives
D.presents
[单项选择]专指是否允许执行CREATE TABLE、CREATE VIEW等与创建数据库对象有关的操作属于______。
A. 对象权限
B. 语句权限
C. 隐含权限
D. 数据权限
[单选题]The basic principle of pressure differential, also known as _______ , says “as the velocity of a fluid (air) increases, its internal pressure decreases”.
A.Bernoulli’s principle
B.Newton’s principle
C.Bernoulli’s law of motion
D.Newton’s law of motion
[单选题]对于国内机场的离场程序而言，如果没有另外公布，程序设计梯度（PDG：Procedure Design Gradient）规定为（）
A.0.033
B.0.025
C.0.04
D.0.02
[单选题]During an instrument departure, if there are no obstacles penetrating OIS surface, the minimum net climb gradient is _______ .
A.0.008
B.0.08
C.0.025
D.0.033
[单项选择]At constant temperature, the pressure of a gas is inversely proportional to its volume.
A. 温度不变，则气体压力和其体积成反比。
B. 在温度不变的情况下，则气体压力和其体积成相反的比例。
C. 在经常的温度下，则气体压力反过来和其音量成反比。
D. 温度不变，气体压力则相反和其体积是成比例的。
[单项选择]Because of the high blood pressure, the doctor advised him to ______ from smoking.
A. constrain
B. restrain
C. refrain
D. remain
