单项选择题

An example of a grade B product is（）.

A.piperyline
B.motor gasoline
C.kerosene
D.mineral spirits

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单项选择题
An entry of water，gas，oil，or other formation fluid into the wellbore is called a（）.

A.blowout
B.kick
C.gusher
D.flow
单项选择题
An engine compartment gasoline fire requires which type of extinguisher?（）

A.Carbon dioxide
B.Dry chemical
C.Foam
D.All of the above
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