題目生食魚肉時,因含有下列何種物質而會破壞維生素B1\mathrm{B}_{1}B1的結構?A.卵白素(avidin)B.硫胺酶(thiaminase)C.轉酮酶(transketolase)D.色胺酸(tryptophan)官方答案B