采用拉线柱拉线的安装时，拉线柱应向张力反向侧倾斜（）。
A.10°～20°
B.25°
C.30°
D.35°
参考答案：A
According to our school regulations, you _____ arrive at school before 7 A.M.
A. may B. can C. will D. should
简述败血症的治疗措施
