题目

Suspecting the traveler of carrying drugs, the Customs official stopped him andhis suitcase, but found nothing at all. A. looked up                    B. went through C. searched for             D. referred to 答案：【解析】选B。考查动词短语辨析。句意:怀疑旅行者携带毒品, 海关官员让他停下来, 并仔细地检查他的箱子, 结果一无所获。go through “仔细地检查” 。亚碳化合物的特征是在1个碳原子上有2个未成对电子，亚碳化合物是具有很高反应活性的有机化合物．下列物质可能属于亚碳化合物的是（　　）A．CH3B．H2C5（链状）C．D．H-C≡C-H