The speed at point D is 9.0 0 km/s kilometers per second, and I'll Everything else we should be able to calculate now from these numbers.

点D时，速度为0,9。,所有的都可以从,这些数字中算出来。

youdao

An ancient Roman road between Rome and Capua, begun in a. d. 312 and later extended to Brindisi, with a total length of more than 563 km (350 mi).

亚壁古道：罗马与卡布瓦之间的古罗马大道，建于公元312年，后延伸至布林·迪西，全长超过563公里(350英里)。

youdao

An ancient Roman road between Rome and Capua, begun in a. d. 312 and later extended to Brindisi, with a total length of more than 563 km (350 mi).

亚壁古道：罗马与卡布瓦之间的古罗马大道，建于公元312年，后延伸至布林·迪西，全长超过563公里(350英里)。

youdao