第12题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. Robert survived the plane crash. B. All the passengers were killed in the plane crash. C. Robert was killed in the air crash. D. Robert is a wonder-working person. 参考答案:A 答案解析:[听力原文] W: It’s a miracle that Robert came out of the air crash alive. M: That’s indeed a mirac
第31题: [单项选择]在三硝基甲苯生产或使用过程中,最有实际意义的侵入人体途径是 A. 呼吸道 B. 皮肤 C. 消化道 D. 呼吸道和消化道 E. 消化道和皮肤 参考答案:B 答案解析:三硝基甲苯在生产或使用过程中,呈粉尘状态,并附着在皮肤上。特别夏季出汗时,易经皮肤汗腺吸收。在生产硝胺炸药时,由于硝胺具有吸湿性。因此,一旦其污染皮肤将起到类似汗液作用,促进其侵皮吸收。