1200D开孔机液压站的发动机燃油是（） A、汽油 。 B、柴油 。 C、煤油 。 D、机油。
After months of negotiations and several proposals， the customer indicates that they may be ready to purchase a pSeries system. Rather than quickly ordering the last configuration proposed， what is the most appropriate next step for a pSeries technical specialist to improve the chance of a successful project？（） Obtain buy-in and feedback from the customer.。 First ask the client executive if financing has been arranged.。 Plan the installation and rollout schedule before ordering.。 Confirm that any additional requirements are handled by others.。
可实现“门到门”运输的是（） 铁路运输。 水路运输。 公路运输。 航空运输。
A system must be evaluated and tuned. In order to use a set of performance evaluation programs （e.g. filemon， svmon， and tprof）， which of the following packages should exist on the system？（） bos.rte.control （WLM）。 bos.perf。 xlC.rte。 perfagent.tool。
何谓半衰期？某药的半衰期为6小时，一次给药后需多少时间可从体内基本消除（消除95%以上）？
下列属于抗氧化剂的有：（）。
