Generally accepted methods for translating project objectives into tangible deliverables and requirements is also referred to as ______ .

A．product analysis

B．risk measurement

C．alternatives identification

D．benefit/cost analysis

手柄取出位的作用正常的情况下，自动制动阀手柄由运转位移至手柄取出位，则（）都能实现。

A.手柄应能取下

B.均衡风缸压力为230～270Kpa

C.列车管压力仍为规定值

D.中继阀能自锁