单项选择题
采用设置龙门板法引测轴线时，用钢尺沿龙门板顶面检查轴线钉的间距，其相对误差不应超过（）。
A.1/1000B.1/2000C.1/3000D.1/4000
单项选择题 The news _______the Chinese football team had won the match excited all of us.
单项选择题 She gave up her job as a nurse because she found the children too difficult ______.
单项选择题 All my classmates have passed the physical education exam except_______.
