在华为BSS/RXCDR参数中，“Um接口阶段标志”的现网主流设置是（）

A:GSM_PHASE_1 B:GSM_PHASE_2 C:GSM_PHASE_3 D:GSM_PHSAE_2+ E:GSM_PHASE_4

GSM是数字蜂窝技术的一种标准，也称全球数字移动通信系统。分三个阶段实现，即（）。

A:Phase1 B:Phase2 C:Phase3 D:Phase2+

GSM第一阶段功能（Phase1）包括（）。

A:呼叫转移 B:呼叫限制 C:呼叫等待 D:全球漫游

Many of the activities performed during the preliminary investigation are still being conducted in(1)，but in much greater depth than before.During this phase,the analyst must become fully aware of the(2)and must develop enough knowledge about the(3)and the existing systems to enable an effective solution to be proposed and implementeD. Besidesthe(4)for process and data of current system,the deliverable from this phase also includes the(5)for the proposed system.

A:analysis phase B:design phase C:implementation phase D:maintenance phase

Many of the activities performed during the preliminary investigation are still being conducted in（1）, but in much greater depth than before. During this phase, the analyst must become fully aware of the（2） and must develop enough knowledge about the（3） and the existing systems to enable an effective solution to be proposed and implemented. Besides the（4） for process and data of current system, the deliverable from this phase also includes the（5） for the proposed system.

A:analysis phase B:design phase C:implementation phase D:maintenance phase

Many of the activities performed during the preliminary investigation are still being conducted in (1) , but in much greater depth than before. During this phase, the analyst must become fully aware of the (2) and must develop enough knowledge about the (3) and the existing systems to enable an effective solution to be proposed and implementeD. Besides the (4) for process and data of current system, the deliverable from this phase also includes the (5) for the proposed system.

A:analysis phase B:design phase C:implementation phase D:maintenance phase

In which phase of the software engineering process is the Software Requirements Specification developed （）

A:development phase B:engineering phase C:maintenance phase D:Definition phase

Many of the activities performed during the preliminary investigation are still being conducted in (1)， but in much greater depth than before. During this phase, the analyst must become fully aware of the (2) and must develop enough knowledge about the (3) and the existing systems to enable an effective solution to be proposed and implemented. Besides the (4) for process and data of current system, the deliverable from this phase also includes the (5) fortheproposedsystem.

A:analysis phase B:design phase C:implementation phase D:maintenance phase

In Which phase of the software engineering process iS the Software Requirements Specification developed

A:definition phase B:engineering phase C:maintenance phase D:development phase

Which phase of the software development requires the most development time

A:the design phase B:the testing phase C:the maintenance phase D:the development phase