未知题型
A.正确橡套电缆导体多为软芯导体，这是因为橡套电缆通常用于需要灵活性和弯曲性的场合，如移动设备、机械设备的电源线等。软芯......
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可以使用游标卡尺测量铜单丝直径（）A.正确B．错误
未知题型可以使用游标卡尺测量铜单丝直径（）
蓄能器有（ ）三类A、重力式B、弹簧式C、充气式D、电磁式
单项选择题蓄能器有（ ）三类
Write a letter to the China National Export Corp. Tell ...
未知题型Write a letter to the China National Export Corp. Tell them you wish to establish business relations with them, with the ideas given below. 1. Introduced by Commercial Counsellor’s Office 2. You are the importer of portable computer for many years. 3. Ask the company to send you an illustrated catalogue and a price list.
