车辆上所有地板木梁、承木、垫木及枕木等是利用了木材的（）力学性能。
A.顺纹抗拉
B.横纹抗拉
C.顺纹抗压
D.横纹抗压
参考答案：D
等底等高的圆柱和圆锥的体积相差24立方厘米，圆锥的体积是______，圆柱的体积是______．
There is no doubt ________ international cooperation is key to ________ with cybercrime.[ ]
A．whether; doing
B．that; dealing
C．whether; dealing
D．that; doing
