2017年職稱(chēng)英語(yǔ)考試?yán)砉ゎ?lèi)單選試題庫(kù)

字號(hào):


    
詞匯選項(xiàng)

    The use of the chemical may present a certain hazard to the laboratory(實(shí)驗(yàn)室) workers.
    A.protection
    B.immunity
    C.danger
    D.indication