问题
判断题
天车经常超载起吊和不合理使用，会使主梁材质疲劳，降低材料屈服点，使其抵抗变形的能力降低，从而使天车主梁产生下挠。
答案
参考答案：对
搜题请搜索小程序“爱下问搜题”
天车经常超载起吊和不合理使用，会使主梁材质疲劳，降低材料屈服点，使其抵抗变形的能力降低，从而使天车主梁产生下挠。
参考答案：对
| 选择合适的句子完成对话。 | |
Betty: Yes . 2 Kitty: Yes, it is . I am thinking about joining it . It's a good chance to learn about team spirit . Betty: 3 Kitty: People over 18 years old . They have to finish the walk within 48 hours . Betty: It's a tough walk but I'm really interested in it . 4 Kitty: Yes , sure . We can be in the same team . Bett : 5 Let's find another two members . |