58. Which of the following is categorized by the text as an “endothermic material” currently used in fire safety?
(A) Borosilicate glass
(B) Asbestos binders
(C) Alum
(D) Gypsum
答案:登入後查看
統計: A(0), B(0), C(2), D(1), E(0) #3930771
統計: A(0), B(0), C(2), D(1), E(0) #3930771