未知题型
"signature on delivery"
Signature on delivery (SOD) 是一种物流和运输服务条款，它要求收件人在货物到达时在递送文件上签......
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未知题型 用所给单词的正确形式填空 The purpose of new technology is to make life (easy) _______ , not to make it more difficult.
单项选择题 China has ______ most famous types of embroidery, each with its own style and different themes.
单项选择题 按90°接线的相间功率方向继电器，当线路发生正向故障时，若φK为30°，为使继电器动作最灵敏，其内角仗值应是__（）
