A.風(fēng)險(xiǎn)規(guī)避 B.風(fēng)險(xiǎn)減少 C.風(fēng)險(xiǎn)消除 D.風(fēng)險(xiǎn)轉(zhuǎn)移
A.0℃ B.10℃ C.30℃ D.60℃
A.40s B.50s C.60s D.100s