题目内容

正常开车应根据绞车启动电流变化情况，操作主令控制器，使提升机均匀加速至规定速度，达到正常运转。（）

A. 正确
B. 错误

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《煤矿矿井机电设备完好标准》规定：同一部位的螺母、螺栓规格一致。平垫、弹簧垫圈的规格应与螺栓（）相符合。

Construction of a new automobile parts manufacturing facility has recently been completed. Thefacility IT manager wants to deploy voice over WLAN. During your initial walkthrough， you observenumerous highly reflective surfaces on the manufacturing equipment and in the buildingconstruction itself. What potential problem exists that should be accounted for during your sitesurvey？（）

A. LOS modulation
B. Multipath distortion
C. RF signal absorption
D. RF signal attenuation
E. Fresnel zone impedance

聚合物的降解

车站客流量包括哪些？