【单选题】增大轴在截面变化处的过渡圆角半径,可以 。
【单选题】增大轴在截面变化处的过渡圆角半径,可以 。
【单选题】由于岩石的抗压强度远大于它的抗拉强度,所以岩石属于
【单选题】The new school is _____ our previous one. [ ]
C.
three times the size of
D.
three times as bigger as
【判断题】矢量的加法运算实际上是矢量的叠加,矢量叠加用的是平行四边形法则或三角形法则。
【单选题】增大轴在截面变化处的过渡圆角半径,可以 .
【简答题】In previous times, then fresh meat was in short ________, pigeons were kept by many households as a source of food. A) store B) provision C) reserve D) supply