Sulfuric acid is a ______．
A. Clear syrupy liquid with no odor
B. Colorless-to-brown liquid with a choking odor when hot
Colorless liquid with a pleasant fruity odor
D. Whitish liquid with a faint，pleasant odor
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Regulations require that cargo tanks in which grades B or C liquids are carried must be vented with which of the following ________．
A. Gooseneck vents
B. Flame screens
C. Pressure vacuum relief valves
D. Forced draft blowers
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