（）是在每件产品上设置一个密码，一般为21位码，消费者可依此查询辨别商品真伪。 ["条形码标识","激光标识","电码防伪","水印纸标识"]
The Benguela Current flows in a（）. ["SW'ly direction along the NW coast of Africa","S'ly direction off the East Coast of Australia","NW'ly direction along the SW coast of Africa","SW'ly direction along the SE coast of Greenland"]
影响债券定价的重要属性有（）。 ["票面利率","税收待遇","流动性","离到期日的时间长短"]
车体门口部位的立罩板为塑料结构。
石灰窑煅烧带温度一般为多少？
石灰窑煅烧带温度表计显示为啥比实际温度低许多？
