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单选题
The crude oil overflowed from measuring-hole due to（）the valve of No.1 tank.
A
not close
B
not closing
C
not have closed
D
no closing
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单选题Before a tank is to be crude oil washed，the oxygen content in the tank must be measured at a position（）.A
immediately above the level of the oilB
at the top of the tankC
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单选题We can draw a conclusion from the text that ______.A
oil-price shocks are less shocking nowB
inflation seems irrelevant to oil-price shocksC
energy conservation can keep down the oil pricesD
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heavy industry becomes more energy-intensiveB
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manufacturing industry has been seriously squeezedD
oil price changes have no significant impact on GDP
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单选题Every（）shall be fitted with a cargo tank cleaning system using crude oil washing.A
existing crude oil tanker of 20000 tons deadweight and underB
new crude oil tanker of 20000 tons deadweight and underC
existing crude oil tanker of 20000 tons deadweight and aboveD
new crude oil tanker of 20000 tons deadweight and above
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单选题In the case of new crude oil tankers，the additional ballast permitted shall be carried in cargo tanks only if such tanks have been（）before departure from an oil unloading port or terminal.A
inertedB
crude oil washedC
dilutedD
cleaned
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