第25题: [填空题]Any two networks in piconets is unlikely to be on the same frequency simultaneously because each network is changing its _______________ thousands of times a second. 参考答案:frequency of operation 或 operational frequency 答案解析:[解析] 本题定位信息是piconets,从而锁定Piconets部分。该部分最后一段倒数第二句提到了同一时间两个网络的频率不可能相同的原因:each network is changing the
第32题: [单项选择]下列不属于绞窄性肠梗阻表现的是 A. 呕吐轻 B. 腹部X线片,见孤立固定肠袢 C. 胃肠减压抽出血性液 D. 有明显的腹膜刺激征 E. 腹部触及压痛性包块 参考答案:B 答案解析:绞窄性肠梗阻呈持续性剧烈腹痛伴阵发性加重,可有固定压痛和腹膜刺激征,可出现脉搏细速、血压下降、面色苍白、四肢发凉等中毒和休克征象,X线可见多个阶梯状排列气液平面。
第35题: [单项选择]David Debut started Computer town UK with the purpose of ______. A. making better use of computer experts B. improving computer programs C. increasing computers sales D. popularizing computers 参考答案:D 答案解析:[解析] 主旨大意题。文章主要讲David Debut建立Computer town UK的目的就是为了让电脑普及。所以正确的答案为D。