开清棉车肚落棉、梳棉抄斩花、梳棉车肚落棉、精梳落棉称为（）。
参考答案：再用棉
根据句意填写单词，完成句子。
1. The boy isn't David. ______ is Jim.
2. My father's sister is my ______.
3. ______ me, is Jim your brother?
4. Linda is my ______ and I'm her mother.
5. Tommy's father and mother are his ______.
下列哪项症状表示发生地方性砷中毒
A．四肢皮肤色素沉着B．骨硬化和骨质疏松C．智力低下D．甲状腺肿大E．骨疼痛
