Genes encoding enzymes involved in the lignin biosynthesis through phenylpropanoid pathway were not only associated with the lignin content, but also related to
目的观察分析模拟舰载起落航线飞行各阶段飞行员的脑力负荷,以提高飞行绩效、维护飞行安全方法采用改良的美国国家航空航天局任务负荷指数(National Aeronautics and Space Administration task load index, NASA-TLX)评价量表,在飞行模拟器上对10名歼击机飞行员进行起落航线课目飞行的脑力负荷主观评估,分析不同飞行阶段飞行员的脑力负荷。结果在模
Increased food demand from the rapidly growing human population has caused intensive land transition from desert to farmland in arid regions of northwest China.