intrinsic safety 内在防爆安全 safety mark 安全标志见care mark.相似单词 safety n.[U] 1.安全;平安 2.【喻】安全保障措施 safety belt =safety belt safety related adj. 安全相关的 safety pin 别针 fail safety 【计】 故障保险, 失效保险 safety valve n. 安全阀 safety deposit n. 存款箱...
∴(())/(())()b∴()(b)=(b/a)、笔试测试(95 分) Ⅵ.根据句意及汉语提示,填写恰当的单词.(5 分) 26.The (安全)of food and medicine is very important to us. 27.He was so strong that he could (举起)up the desk easily. 28.He had many _ ___(机会)to go to college,but he ...