请写出两个《朝花夕拾》中《二十四孝图》里关于“孝”的典故有哪些？
参考答案：
子路贡米、董香扇枕、老莱娱亲、郭巨埋儿、卧冰求鲤。
In the contract, usually there is a ________ clause to protect the buyer against loss from delay of the shipment of the goods.
A．payment B．shipmentC．penaltyD．quality
硫的危害在于（）。
A.冷弯性能降低
B.偏析
C.抗腐蚀性增强
D.抗腐蚀性降低
