多项选择题 Creo工程特征有几种。（ ）

判断题 经位置线是指综平时的织口、综眼、停经架中导棒和后梁握纱点等各点所连接的一条折线。经位置线不同，经纱张力不同，对织物结构、外观质量和织机生产率都有不同的影响。

单项选择题 3.The number of Jingdezhen porcelain transported through the "Land Silk Road" was very large at that time because porcelain was suitable for land transportation.