A. Never save the first specimen you find B. Always save the first specimen you find C. Save the second specimen you find D. Save all but the first specimen you find 参考答案:B 答案解析:参见最后一段。
第12题: [单项选择]The air required for combustion is taken from the engine room through a filter fitted on the turbochargerThis reduces the risk for too and contamination of the combustion air() A. high temperatures B. low temperatures C. wet D. dirty 参考答案:B