【简答题】求函数 在五种不同区域(1) (2) (3) (4) (5) 的罗朗展式
【单选题】— I suggest buying her a Teddy Bear for her birthday. —_____someone else brings the same present?
【单选题】__ Why do you suggest buying a new machine? __ Because the old one has been damaged __________.
【判断题】齿轮传动能保持恒定的瞬时传动比,故传动平稳。