单选题
Water accumulation in the cylinder of a secured engine is an indication that the （）
发布日期：2021-03-22
soft water pump was not secured along with the engine
jacket water thermostat has failed
cylinder liner may be cracked
raw water pump is over-speeding just prior to engine shutdown
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此试题出现在
随年龄增长，晶体内水分逐渐（）；透明度和可塑性逐渐（）。
化学消毒灭菌剂的使用原则。
构成统计量的函数中可以包含未知因素。（ ）
了解海外客户网络购物的消费理念和文化是跨境电商人才应具备的素质。
为了通过磁力观测实现对地下的探测，研究区必须具备哪些条件，观测过程要考虑那些因素？对观测数据要做哪些处理？
某市政道路改造工程，与道路同时施工的综合管线有0.4MPA.的D.N600中压燃气管和D.N1400的上水管，并排铺设在辅路之下，上述燃气和上水管均为钢管，并合槽施工。设计两管中心距为2m。在审查燃气管线纵断设计时，发现燃气管道的高程分别与一道过街污水管和一道过街直埋电缆相撞。经与设计洽商，燃气管线调整高程，从污水管上穿过，从电缆下穿过，致使从电缆下穿过的部位为本工程中高程最低点 燃气管线与上水管线的水平净距（）规范要求．
吸入用糖皮质激素不包括（）
碳和硅是钢轨中强化元素，它们的含量越高越好。
人机系统组成的串联系统中，如果人的操作可靠度RH=85%，机器设备可靠度RM=97%，则人机系统可靠度Rs等于（ ）。P190公式(4—14)
下元虚冷，肾不纳气之虚喘，应选用（）。
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