题目

阅读理解 Chinese media and Internet users on Mondaydecried（谴责）alack of morals in society after a child was struck twice by two differenttrucks and left bleeding on the road as more than a dozen bystanders didnothing to help the seriously injured girl. The incident, captured by asurveillance camera and aired by Southern Television Guangdong (TVS), showedthe two-year-old girl was knocked down and run over by a white truck on anarrow market street on the afternoon of Oct. 13, in Foshan City of GuangdongProvince. The driver fled the scene of the accident,leaving the girl to bleed on th已知某多肽链的分子量为1.032×104；每个氨基酸的平均分子量为120。每个脱氧核苷酸的平均分子量为300。那么合成该多肽化合物的基因的分子量约为 [　　] A．12120B．90900 C．181800D．170928