美国官员称,中国军方上周对机动型洲际弹道导弹进行第四次试验飞行,在8月30日那天发射了一枚新型公路机动型洲际弹道导弹。美国情报机构对从中国五寨导弹和航天试验中心飞往中国西部一处试验场的"东网 U.S. officials said that the Chinese military conducted its fourth pilot flight of a mobile intercontinental ballistic missile last week and launched a new road-mobile ICBM on August 30. U.S. intelligence agencies fly from China’s Wuzhai missiles and space flight test center to a pilot site in western China