更多"In 1983, when oil process were till"的相关试题:
[单项选择] In 1983, when oil process were till high in my area, I installed a ground-source heat pump in my brand-new, and insulated 1,600-square-foot house. It cost several thousand dollars more than comparable systems that use oil, gas, or wood, but I figured I’’d recover my higher initial expense in a few years through lower energy bills.
True, my heat pump runs on electricity-an expensive commodity where I live. But most of its energy comes from the earth: a propylene-glycol solution circulates through 1,200 feet of two-inch-diameter plastic pipe buried three feet deep in a field next to my house. As it travels, the solution absorbs heat from the surrounding soil, even when soil temperature drops below freezing.
My ground-source heat pump also offers important benefits that have nothing to do with economics.
*Minimal fire hazard-no chimney, firebox, or heating elements-only pumps, fans, and a compressor.
*Cleanliness-no combustion products, thus no chance of my heating syst
A. soil in a nearby field
B. sun panels at ground level
C. a pipe buried next to the walls
D. a tank of propylene glycol
[单项选择]All the off-shore oil explorers were in high spirits as they read ______ letters from their families.
A. affectionate
B. sentimental
C. intimate
D. sensitive
[单项选择]High oil prices have not yet produced an economic shock among consuming countries, but further rises, especially sharp (21) , would undoubtedly hurt the world economy, and (22) would inevitably harm producers, too. Beyond this obvious point, (23) , higher prices could even do harm to both oil firms and producers.
Big oil firms (24) rolling in money today, but that disguises the fact that their longer-term prospects are (25) Behind the reserves-accounting scandal at Royal Dutch/ Shell (26) a problem bedeviling all of the majors: replacing their dwindling reserves. (27) existing fields in Alaska and the North Sea are rapidly declining; OPEC countries and Russia are (28) them out. (29) they are to survive in the long term, the big oil firms must embrace other sources of energy (30) oil.
(31) it is to believe, higher oil prices could be bad news for produc
A. For hard
B. As hard
C. Very hard
D. As hard as
