Energy can be created or destroyed
Energy may not be transformed
The total quantity of energy in the universe is always the same
None of the above
第1题：
Which of the following statements concerning intellectual property is wrong？（）
第2题：
Cargoes are any type of goods transported by any type of ships
Cargoes are goods transported in bulk
Cargoes usually include goods transported in bulk and in containers
Cargoes are usually packaged in containers
第3题：
A language change is inevitable
B language change is abrupt
C language change is universal
D language change is extensive
第4题：
They are particularly suited for pumping high viscosity fluids
They are started with the discharge valve opened
The flow of liquid is developed by imparting energy due to the rotation of an impeller
They are always mounted in a horizontal position
第5题：
Oil energy has been popular with the manufacturing industry.
Solar energy is too expensive for family use at present.
Wind energy is much used in plateaus.
Water energy is widely used in costal regions.
第6题：
c=d
l and k are parallel
m and l are perpendicular
第7题：
In order for a fluid to be pumped, a fluid must be made to flow
A substance must be cold in order for it to be pumped
The kinetic energy imparted by the pump can be used to force a liquid through a hydraulic system
A pump must receive its energy from an external source
第8题：
Which of the following statements in supported by the passage?
A．The sun shines constantly and gives out the same amount of energy every year．
B．The cause of the sun’S fluctuations is its loss of energy with each passing year
C．It is sure that the energy sent out by the sun will drop when more sun spots appear．
D．Fluctuations in weather pattems are the results of the pull of gravity．
第9题：
Special tools are required for lapping or grinding
It is impossible to throttle flow with a butterfly valve
To close the valve, it is only necessary to turn the handle a quarter of a turn
The butterfly valve should never be used in a freshwater system
第10题：
High conductivity of the distillate indicates distillate salinity is excessive
Increasing the absolute pressure of the shell will increase the distillers capacity
Mesh separators are used in evaporators to filter the distillate
Reducing the brine density will reduce the heat lost overboard