电工不顺铜，天理都不容。 电工不搞铜，要受一世穷。 这顺口溜不知道谁编的，但却是非常形象的！ 做电工的，几乎没有不顺点铜的，别小看这点铜，你知道它的价值有多高吗？ 每斤竟然能卖到30元！ 甚至还卖过33以上的。
Month: November 2023
A classroom space that is conducive to learning should feel natural and fresh, not cramped and stuffy, researchers explain in a 2021 study. Views of nature and green spaces from windows appear to make a difference: “Students reported less stress and were more focused on a task in classrooms with more natural window views.”