题目内容:
WhyisONBunsatisfactory?
A.ItbreaksdownwhenitabsorbsNIRligh B.Itfallsoffthepolymerandtriggersdrugreleas
C.Ithasnotcomeontothemarketuptillno
D.Itisnoteffectiveenoughandcouldbepoisonou
参考答案:
答案解析: