In the early days of the United States,
postal charges were paid by the recipient and Charges varied with the distance
carried. In 1825, the United States Congress permitted local postmasters to give
letters to mail carriers for home delivery, but these carriers received no
government salary and their entire compensation depended on what they were paid
by the recipients of individual letters. In 1847 the United States Post Office Department adopted the idea of a postage stamp, which of course simplified the payment for postal service but caused grumbling by those who did not like to prepay. Besides, the stamp covered only delivery to the post office and did not include carrying it to a private address. In Philadelphia, for example, with a population of 150, 000, people still had to go to the post office go get their mail. The A. Boston and Philadelphia B. businesses C. arrangements D. letters [简答题]简述2号线空调机组变频板的控制方式
[判断题]在室内高压设备上工作,其工作地点两旁间隔和对面间隔的遮栏上禁止通行的过道上应悬挂“禁止合闸,有人工作!”标示牌。
A.正确 B.错误 [简答题]根据钢管规格如何选择锯片?
[单选题]在一定的( )条件下,逆卡诺循环的制冷系数最大。
A.温度 B.湿度 C.饱和度 D.过热度 [单选题]以下选项中哪个身份角色可以在CM2006系统中对客户基础信息进行维护。( )
A.资料维护员 B.综合员 C.业务管理员 D.运行管理员 [单选题]线路允许速度不大于120km/h,在直线上的超高顺坡,有缓和曲线时不得大于( )mm。
A.8 B.10 C.15 D.25 [单选题]甲欲杀乙,用菜刀对乙的胸部砍击,乙倒地后甲误认为乙已经死亡,便迅速逃离现场。乙被送到医院后经抢救脱离生命危险,但因护士在输液时用错药物致乙死亡。甲的行为构成()。
A. 故意杀人罪(未遂) B. 故意伤害罪 C. 故意杀人罪(既遂) D. 过失致人死亡罪 [多项选择]随着信息技术的发展,电子商务(E-business)、电子银行(E-banking)、电子政务(E-government)正在走进我们的生活。许多人购物和旅行时经常使用信用卡。信用卡作为电子货币的一种,在使用过程中执行的货币职能有
A. 一般等价物 B. 流通手段 C. 贮藏手段 D. 支付手段 [单选题] 对政府专职消防员的年度考核工作中,民主测评按照“德、能、勤、绩、廉”由基层指战员进行评价,指战员参加比例不应低于所在单位实有人数的( ),按照个人述职、民主评议、综合测评、组织鉴定的程序进行。
A. 75% B.80% C.85% D.90% [多选题]3.73.第72题
下列容易产生局部放电的设备结构和制造工艺的缺陷是()。 A.绝缘内部局部电场强度过高 B.金属部件有尖角 C.绝缘混入杂质 D.局部带有缺陷产品内部金属接地部件之间、导电体之间电气连接不良 [判断题]禁止在不具备行驶条件的雨雾凝冻天气下出动汽车。( 错误 )
A.正确 B.错误 [单选题]交流接触器E形铁心中柱端面留有0.1~0.2mm的气隙是为了( )。
A.减小剩磁影响 B.减小铁心振动 C.利于散热 我来回答: 提交
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