第28题: [单项选择]第一心音 A. 标志心室收缩的开始 B. 与心房收缩有关 C. 标志心室舒张的开始 D. 似第二心音之回声 E. 似第一心音之回声 参考答案:A
第29题: [单项选择]Widespread wage reductions were imposed during the recession of 1906--1909 and price inflation thereafter impeded the recovery of real wage levels. A. convoluted B. belied C. encumbered D. stoked 参考答案:C 答案解析:[解析] 各选项的意思是:convoluted盘旋,包卷。belied盘旋,包卷。encumbered 妨碍,打扰。stoked给(机车等)烧火;把(火)拨旺。画线单词impeded的意思是:阻碍,阻