变电站主变过载时应如何消除过载？
BMW一般采用哪种转向器（） 齿轮齿条式。 循环球式。 蜗杆齿扇式。 伞形齿轮式。
简述清纱目的。
轻瓦斯保护动作应如何处理？
In preparing a cargo space for receipt of a shipment of bagged cargo，which instruction for laying dunnage should be followed? （） Use either 1 or 2 tiers of dunnage，spacing the pieces in each tier a foot apart，and lay pieces in the bottom tier diagonally to the ship's side。 Use 1 tier of dunnage，laying the pieces tightly together to form a solid floor over the steel deck。 Use 2 tiers of dunnage，spacing the pieces in the bottom tier about a foot apart and the pieces in the top tier 6 inches apart。 Use 2 tiers of dunnage，spacing the pieces in the bottom tier about a foot apart and the pieces in the top tier together。
以下关于细胞离子通道的描述，错误的是（）
