Many of the activities performed during the preliminary investigation are still being conducted in （）, but in much greater depth than before. During this phase, the analyst must become fully aware of the （） and must develop enough knowledge about the （） and the existing systems to enable an effective solution to be proposed and implemented. Besides the （） for process and data of current system, the deliverable from this phase also includes the （） for the proposed system.

the deliverable from this phase also includes the（）for the proposed system.

A．hardware and software specification

B．system performance specification

C．formal requirements definition

D．general problem statement

“月落乌啼霜满天，江枫渔火对愁眠。姑苏城外寒山寺，夜半钟声到客船。”这首诗歌中的“愁”字是指( )。

A．仕途失意
B．思乡之苦
C．贫病交加
D．寒意袭人