机械分段锚段关节转换柱处两接触线的水平距离的安全值是：（）mm。
A.50－250
B.40－250
C.30－250
D.20－250
参考答案：A
–Could I _____ this book?
--Sure. But you can only _____ it for one week.
A．lend, borrow
B．borrow, lend
C．keep, lend
D．borrow, keep
In relation to the contents of a contract explain the following:
(c) warranties; (3 marks)
