更多"Machines that use hydraulic pressur"的相关试题:
[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 mechanical energy can be changed back into electrical energy by means of a generator．（）
A. 通过发电机这种途径可以将机械能转变为电能。
B. 利用发电机可以将机械能转变为电能。
C. 借助于发电机可以把机械能返回电能。
D. 使用发电机这个方法能将机器产生的能量还原成电。
[单项选择]We can conclude from the passage that using an electric car can ______.
A. save more money than using the regular cars in every way
B. prevent pollution and save energy in the long run
C. attract more customers to buy VSPs
D. soon lead to eliminating traditional cars
[单项选择]Modem machines only bring people problems.
A. Right.
B. Wrong.
C. Doesn’t say.
[单项选择]The author discusses computing machines in the first paragraph primarily in order to ______.
A. indicate the dangers inherent in relying to a great extent on machines
B. illustrate his views about the approach of mathematicians to problem solving
C. compare the work of mathematicians with that of computer programmers
D. provide one definition of intelligence
[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
[单项选择]If this kind of machines had been invented earlier ,much more labor would have been saved（）
A. 假如这种机器被发明得更早一点的话，那么更多的劳动将会已经节省下来了。
B. 如果人们早一点发明这种机器，人们就不用干更多的劳动。
C. 一旦这种机器更早一点创造出来，就需要更多的劳动力。
D. 假如这种机器发明更早的话，那么更多的劳动力已经节省下了。
[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]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
[单项选择]The ship took machines and other goods back to the port ______ it had set off.
A. from which
B. to which
C. which
D. in which
[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
[单项选择]The new washing machines are being（）at the rate of 50 a day in this factory.
A. turned off
B. turned down
C. turned out
D. turned in
[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
[单项选择]All the parts of these washing machines are ______ , so that it is very convenient to replace them.
A. normalized
B. modernized
C. mechanized
D. standardized
