单选题
发布日期:2021-03-22
class A fires
class B fires
class C fires
class D fires
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Fires involving combustible metals are classified as ().
Fires involving combustible metals are classified as ().
Fires occurring in combustible metals, such as sodium or magnesium, are classifi...
Fires occurring in combustible metals, such as sodium or magnesium, are classifi...
Fires can be divided into different ().
A combustible gas indicator is used to determine ().
A combustible gas indicator is used to determine ().
0il fires are best extinguish by().
A fire extinguisher is used for ()fires.
Oil fires are best extinguished by().