【单选题】Without proper planning, tourism can cause problems．For example, too many tourists can(面性)crowd public places that are also enjoyed by the inhabitants of a country．If tourists create too much traffic,...

【简答题】低碳钢可锻性良好，奥氏体钢可锻性（）。

【判断题】影响可锻性的因素有硬度和强度。

【单选题】明沟和阴沟哪个可以更深一些

【单选题】下列可锻性最好的铁碳合金是（ ）。

【简答题】用无可锻性铸铁制的阴沟盖

【单选题】In department stores and closets all over the world, they are waiting. Their outward appearance seems rather appealing because they come in a variety of styles, textures, and colors. But they are ulti...

【单选题】可锻性好坏取决于材料的（）。

【单选题】In department stores and closets all over the world, they are waiting. Their outward appearance seems rather appealing because they come in a variety of styles, textures, and colors. But they are ulti...

【单选题】下列金属中可锻性(或锻造性)最好的是( )