如果方案收入难以定量预计，一般采用（）进行方案优选。 净现值法。 费用现值法。 净年值法。 差额内部收益率法。
The pSeries technical specialist has a number of tasks to perform and does not have time to do them all. It is a week before the end of quarter and the account executives all state that their individual requests are the highest priority. How should the following task list be prioritized？ （） 1. Return a call from customer seeking compatibility information. 2. Configure three p690 servers to be ordered in two weeks. 3. Prepare a POWER5 presentation to give to a customer in two weeks. 4. Configure three p690 servers to be ordered this quarter. 4，2，1，3。 4，3，1，2。 2，4，3，1。 2，3，4，1。
后茶馆式教学继承了茶馆式教学的核心（）。 讲。 练。 议。 读。
下面关于Linux系统文件挂载的叙述中，正确的是（）。 /可以作为一个挂载点。 挂载点可以是一个目录，也可以是一个文件。 不能对一个磁盘分区进行挂载。 挂载点是一个目录时，这个目录必须为空。
Evaluate the following command and its output: Which two statements correctly interpret the output?（） FREE_SPACE indicates only the space that is currently unallocated.。 ALLOCATED_SPACE indicates only the space currently allocated and in use.。 FREE_SPACE indicates only the space that is currently allocated and available for reuse.。 ALLOCATED_SPACE indicates both the space currently allocated and used, and the space that is available for reuse.。 FREE_SPACE indicates both the space that is currently allocated and available for reuse, and the space that is currently unallocated.。
20阀中，紧急阀的紧急室排气限制孔的孔径为（）。
