【单选题】Fires occurring in combustible metals, such as sodium or magnesium, are classified as a _________. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
class A
B.
class D
C.
class B
D.
class C prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【单选题】Because more and more houses are built near forested areas, forest managers have been practicing fire exclusion to prevent naturally occurring forest fires since they might threaten those residential ...