题目

Alice decides to see the dentist because she has a ________.A.headache B.toothache C.backache D.stomachache 答案：【答案】B【解析】句意：Alice决定去看牙医，因为她牙痛。headache头疼，toothache牙痛，backache背痛，stomachache胃疼；根据句子中的see the dentist可知她牙疼，故选B。 若△ABC∽△DEF，△ABC与△DEF的相似比为2∶3，则S△ABC∶S△DEF为 [　　] A．2∶3 B．4∶9 C．∶ D．3∶2