代替
“沉舟侧畔千帆过，病树前头万木春。”“芳林新叶催陈叶，流水前波让后波。”这两句诗包含的哲学道理是（ ）
“沉舟侧畔千帆过，病树前头万木春。”“芳林新叶催陈叶，流水前波让后波。”这两句诗包含的哲学道理是（ ）
科学家不断培育良种的一个重要原因，是因为某些农作物品种在种植几年后，其品性会逐渐退化，由此导致其产量降低，抗病虫害的能力下降。这表明发展是（ ）。
科学家不断培育良种的一个重要原因，是因为某些农作物品种在种植几年后，其品性会逐渐退化，由此导致其产量降低，抗病虫害的能力下降。这表明发展是（ ）。
If men were all good, this percept would not be a good one; but as they are bad, and would not observe their faith with you, so you are not bound to keep faith with them.
If men were all good, this percept would not be a good one; but as they are bad, and would not observe their faith with you, so you are not bound to keep faith with them.
格构式轴心受压柱整体稳定计算时，用换算长细比代替，这是考虑_ ___。
格构式轴心受压柱整体稳定计算时，用换算长细比代替，这是考虑_ ___。D