防爬轨与称量轨的间距为（）。
A、5-15mm；
B、3-10mm；
C、10-20mm
参考答案：A
In relation to corporate governance:
(b) Explain how the powers and accountabilities of a sole executive body of a company limited by shares are determined. (5 marks)
输油臂有（）和重力平衡式两种。
A.液压式
B.悬臂式
C.铰接式
D.无力矩式
