合同争议解决的途径有哪些（）
A.协商解决
B.和解与调解
C.仲裁
D.起诉
参考答案：A, B, C, D
Portable CO2 fire extinguishers should NOT be used to inert a space containing flammable liquids due to the danger of（）.
A.the CO2 being inhaled by personnel
B.reflash of burning liquids
C.vapor condensation on the extinguisher
D.the discharge causing a static spark
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