| By the mid-nineteenth century, the term
"ice-box" had entered the American language, but ice was still only beginning to
affect the diet of ordinary citizens in the United States. The ice trade grew
with the growth of cities. Ice was used in hotels, taverns, and hospitals, and
by some forward-looking city dealers in fresh meat, fresh fish, and butter.
After the Civil War (1861- 1865), as ice was used to refrigerate freight cars,
it also came into household use. Even before 1880, half the ice sold in New
York, Philadelphia, and Baltimore, and one-third of that sold in Boston and
Chicago, went to families for their own use. This had become possible because a
new household convenience, the ice-box, a precursor of the modern refrigerator,
had been invented. Making an efficient ice-box was not as easy as we might now suppose. In the earl A. basic B. sufficient C. necessary D. undeveloped [判断题]如果企业负债资金为零，则财务杠杆系数为1。 ( )
[单选题]假设其他条件不变，当市场利率低于票面利率时,下列关于拟发行平息债券价值的说法中,错误的是（）。
A.市场利率上升，价值下降 B.期限延长，价值下降 C.票面利率上升，价值上升 D.计息频率增加，价值上升 [多选题]( )落实不力是造成救援人员伤亡的重要原因。
A. 安全制度 B. 安全责任 C. 安全措施 D. 专业指挥 [单选题]泡沫灭火器不能用于扑救( )火灾。
A. 木材 B. 油类 C. 电气 D. 橡胶 [多选题]路径查询确认原则：出口车道特情处置中（ ）和（ ）应先进行查询确认。
A.无入口信息 B.升档 C.降档 D.在线计费失败的 [多选题]影响静止流体内部某点压强的因素有( ).
A.流体的质量 B.流体的密度 C.流体液面上方的压力 D.该点在流体中的深度 [单项选择]铁质配电箱箱体的铁板厚度为大于（）。
A. 1.0mm B. 1.2mm C. 1.5mm D. 2.0mm [多项选择]微小病变型肾病的临床特征为（）。
A. 男性多于女性，好发于儿童 B. 水肿、高脂血症 C. 可伴有镜下血尿 D. 持续性高血压及肾功能减退 E. 大量蛋白尿，低白蛋白血症 [多选题]车站运用客票系统业务监控与客运设备监控软件，实时监控ATM—铁路自动售票机（ ）、设备故障等运行状态，及时发现问题，保障设备稳定运行。
A.运行状态 B.使用情况 C.售票、取票 D.票卷运用 [单选题]女性，35岁，已婚。10小时前出现上腹部胀痛，6小时前疼痛转移至右下腹，伴恶心、呕吐、体温升高。查体:腹肌紧张，右下腹压痛、反跳痛阳性，肠鸣音减弱。血常规示：白细胞总数及中性粒分类升高。
术后5天，患者出现下腹坠胀、大便频繁、里急后重，伴尿频、尿痛。最可能的原因是
A.急性胃肠炎 B.急性附件炎 C.泌尿系感染 D.阑尾残株炎 E.盆腔脓肿 [单选题]以下登高平台消防车检查维护项目,属于每周进行的是( )。(中)
A.发动机机油 B.轮胎及气压 C.变速箱及取力器液位 D.发动机冷却液 [单项选择]塔式起重机，应将起重臂转至（）方向。
A. 顺风 B. 侧风 C. 顶风 我来回答: 提交
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