检测发动机气缸时,其各缸直径之差不得超过()。 ["25mm","5mm","75mm","10mm"]
据《灵枢•师传》,肠中寒则() ["肠鸣飧泄","消谷","疾饥","小腹痛胀","脐以下皮寒"]
下左旋螺纹钻具时,绝不允许用()给左旋螺纹钻具上螺纹。 ["转盘","吊钳","链钳","液动大钳"]
低压是指对地电压在()及以下的电压。 ["250V","500V","800V","1000V"]
井位上方有高压线时应考虑偏移井位,此偏移距应最少是井深的()倍 ["A、1.5","B、2","C、4","D、10"]
纸类具有的优点。