第21题: [单项选择]Questions 9 to 12 are based on the conversation you have just heard. A. He’s taking a break from studying. B. He has already finished studying. C. He was assigned to watch a program by his professor. D. He’s finding out some information for a friend. 参考答案:A 答案解析:[解析] Q: Why is the man watching television
第30题:[多选题]第 432 题, 本小题 1 分 变电站间10千伏联络线正常方式时应(____),以便于及时转供负荷、保证供电可靠性。 A. 一侧运行 B. 一侧热备用 C. 一侧冷备用 D. 两侧运行 参考答案:AB
第31题: [单项选择]关于胎儿成熟度检查的叙述,下列哪项不正确() A. 羊水L/S>2.0表示胎儿肺成熟 B. 羊水肌酐浓度≥176.8μmol/L提示胎儿肾成熟 C. 羊水A450<0.02提示胎儿肝成熟 D. 羊水脂肪细胞出现率<20%表示胎儿皮肤成熟 E. 羊水淀粉酶活性>120苏氏单位表示为成熟儿 参考答案:D 答案解析:羊水脂肪细胞出现率>20%,则表示胎儿皮肤成熟。