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单选题
Large quantities of water______needed for cooling purposes.
A
are
B
is
C
have
D
has
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单选题Which of the following accurately describes the meaning of redundant cooling？（）A
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immediately flush the spill with large quantities of fresh waterB
cover the contaminated surface with soda-ash-soaked lime solutionC
add sodium bisulfate on the contaminated surface and spray it down with waterD
move to a position upwind of the spill and allow the product to boil off
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单选题Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent?（）A
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单选题As wholesalers(批发商) we are ____ to handle large quantities.A
of a positionB
in the positionC
at a positionD
in a position
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