4in=()

[单选题]4in油管的外径为（）。A .10.16mmB .101.6mmC .40mmD .80mm

[单选题]Text 4In 1960—1961, Chad (乍得) harvested 98,000 tons of cotton for the first time in its history, and put out the flag a little too soon. The efforts of the authorities to get the peasants ' back' to work, as they had slacked off a great deal the pr

[单选题]螺纹代号ZC3/4in表示（）A . 公称直径3/4in，左旋圆柱管螺纹B . 公称直径3/4in，右旋圆柱管螺纹C . 公称直径3/4in，左旋锥柱管螺纹D . 公称直径3/4in，右旋锥柱管螺纹

[单选题]Text 4In 1784, five years before he became president of the United States, George Washington, 52, was nearly toothless. So he hired a dentist to transplant nine teeth into his jaw – having extracted them from the mouths of his slaves.That’s a far dif

[单选题]3/4in管子正确的公称直径表示是（）。A .Dg25B .DN40C .φ38×3D .DN20

[单选题]3/4in以内钢丝绳卡数为（）。A .3B .4C .5D .2

[单选题]3/4in以内钢丝绳卡距为（）。A .80～160mmB .80～120mmC .80～110mmD .90～110mm

[单选题]石油钻杆接头4A31第一位4A表示钻杆公称尺寸为4in，第二位3表示螺纹型为（）第三位1表示外螺纹。A . 内平型B . 贯眼型C . 正规型D . 数字型

[单选题]：9，-4，7，4，5，-4，3，4，1，-4，（ ），（ ）。A．0，4B．-1，4C．-1，-4D．1.4

[单选题]9，-4，7，4，5，-4，3，4，1，-4，（ ），（ ）。A．0，4B．-1，4C．-1，-4D．1.4