水面在宽2-3m之内,水深过0.7m时,应按国家规范规定,栏杆高度宜为1.10m,以保证安全。
参考答案:对
引发牙痛的主要因素是()引发腹痛的主要因素是()引发颈肩痛的主要因素是()
A.脑膜炎
B.高血压
C.带状疱疹
D.退行性病变
E.炎症及功能障碍
商业保险的含义、分类、原则
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