Feed water heaters are necessary for () to increase its efficiency
A.the generator
B.the boiler
C.the main engine
Feed water heaters are necessary for () to increase its efficiency
A.the generator
B.the boiler
C.the main engine
A.satisfy popular curiosity
B.answer scientific questions
C.establish its activities
D.determine its eating habits
A.conviction
B.principle
C.premise
D.medium
A.lower the production cost
B.hire a better designer
C.improve its quality
D.alter its image
A. Because its database is disorganized.
B. Because the information required is specific.
C. Because its information is diverse and widespread.
D. All of the above.
Which of the following is TRUE according to the first paragraph?
A.Mexico has stepped into an aging society.
B.It is not necessary for Mexico to control its population.
C.Mexico population is younger than that of developed countries.
D.It is not necessary for Mexico to develop its infrastructure.
A.original
B.primary
C.crude
D.raw
A.expand B.extend C.extent D.expect
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