第24题: [单项选择]下列哪一项不属于物理灭火方法() A. 冷却法 B. 抑制法 C. 稀释法 D. 破坏火焰稳定性 参考答案:B
第25题: [单项选择]心电图在正常窦性P波时,下列描述中不正确的是() A. Ⅰ导联直立 B. aVF导联直立 C. aVR导联直立 D. Ⅱ导联直立 E. V4~V5导联直立 参考答案:C
第26题: [单项选择]You’d better go there by train. The train ticket is ( ) the plane ticket. A. as cheap three times as B. as three times cheap as C. three times as cheap as D. cheaper three times than 参考答案:C 答案解析: