__________means “Bottom or lower part of an organ.”
A.base
B.apex
C.supine
D.prone
A.base
B.apex
C.supine
D.prone
A.press tightly
B.believe to take
C.dip
D.put
_____ is secured by means of side-chock bolts and end-chock bolts.
A.The bedplate
B.The column
C.The main bearing
D.The double bottom
A.low
B.high
C.base
D.bottom
The word "kicks" in line 6 from the bottom probably means
A.excitement
B.income
C.motivation
D.knowledge
THE ANCHOR WAS HEAVED AWEIGH means ______.
A.The anchor was weighted
B.The anchor was let go
C.The anchor was lost
D.The anchor was clear of the bottom
A、win all money at a casino gambling table
B、bet all one has on something
C、means to make a lot of money
D、to have no money
“The anchor was heaved aweigh” means ________
A.“The anchor was let go”
B.“The anchor was foul”
C.“The anchor was clear of the bottom”
D.“The anchor leading abeam”
Passage Three
In an age when waste today means a lack tomorrow, making use of every available resource becomes more and more important. As coal is being used in greater and greater amounts to produce electricity, larger amounts of ash, by-product of coal, are produced. When coal is burned
in a boiler, two kinds of ash by-product are produced, a heavy bottom ash and a fine-as-powder fly ash that is filtered and captured by precipitators. About 10 to 15 percent of the coal by-product is bottom ash which is used like sand on icy city streets and highways and also on highways as paving material. It is the fly ash, however, that is receiving the greater amount of attention. Fly ash may be used as an additive to concrete in the construction of dams, bricks, and roads, and can replace up to 20 percent of the cement used in concrete. As a by-product of burned coal, fly ash requires no additional expenditure of energy to be produced, while cement production requires great amounts of energy.
In addition to using fly ash as a concrete additive, the technology is available to extract the main mineral components-aluminum, silicon, and magnetic. Today, extracting these components is a very expensive process, but the time may come when it is cheaper to extract these products from ash than to mine new supplies.
41. What can be used as a material to pave roads?
A. The coal by-product.
B. Additive.
C. Fine-as-powder fly ash.
D. Both B and C.
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