题目

Which pair of the words with the underlined letters has different sounds?A.location examination B.exchange exhibition C.treasure spread 答案：【答案】B【解析】句意：哪对带下划线的单词有不同的发音？考查单词的读音。location/ləʊˈkeɪʃn/，examination /ɪgˌzæmɪˈneɪʃn/；exchange/ɪksˈtʃeɪndʒ/，exhibition /ˌeksɪˈbɪʃn/；treasure /ˈtreʒə(r)/；spread /spred/。根据单词的读音可知，B选项中两个单词划线部分的发音不同。故选B。6．人的卵细胞中不可能含有（　　）A．常染色体B．性染色体C．X染色体D．Y染色体