28 聚合酶連鎖反應(Polymerase Chain Reaction, PCR)之反應試劑中不包含下列何種物質?(A) oligonucleotide primer(s)(B)耐熱性 DNA polymerase(C) DNA ligase(D)四種去氧核糖核苷三磷酸(deoxyribonucleoside triphosphates)