- 搜標(biāo)題
- 搜題干
- 搜選項(xiàng)
單項(xiàng)選擇題
通常輕質(zhì)油品和重質(zhì)油品分別測(cè)（）
A.開(kāi)口閃點(diǎn)和閉口閃點(diǎn)
B.閉口閃點(diǎn)和開(kāi)口閃點(diǎn)
C.開(kāi)口閃點(diǎn)和開(kāi)口閃點(diǎn)
D.閉口閃點(diǎn)和閉口閃點(diǎn)
