《煤矿安全质量标准化标准》规定,综采工作面机道梁端至煤壁顶板的冒落高度不得大于()mm。
用机械水平仪测量水平时,气泡读数高端为3格,其高端扬度为()mm/m(注:灵敏度0.02mm/m)。
A. 0.03
B. 0.06
C. 0.02
D. 0.08
If an electric cargo winch is being used to lift a draft of cargo and the engine room loses all power,which will occur?()
A pawl,forced by a spring mechanism,will engage the teeth of the bull gear and hold the load
B. An electromagnetic brake will hold the load where it is suspended
C. The load will fall rapidly to the deck unless the foot brake is engaged
D. The load will slowly lower to the deck under control of the drag of the winch motor
失语症口语理解障碍中,"这种患者不能分辨近似的、只以一个特点相区别的’对应’音"属于()
A. 找词困难
B. 语音辨识障碍
C. 词义理解障碍
D. 话语理解障碍
E. 听语记忆广度障碍