A. 削弱烟株体内氧化还原过程 B. 减少呼吸 C. 防止叶绿素受到破坏 D. 降低烟株对病害的抵抗能力
A. north-west of Australia B. south-east of Australia C. north-east of Australia D. south-west of Australia
A/T使用自己的N1极限值 B. FMC计算的N1已到极限 C. 发动机N1已到极限 D. A/TLIM故障