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简述一些重要生物活性物质产生菌分离方法。

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某幼儿入睡不久，突然哭喊出声，坐起，两眼直视，表情恐惧，叫他则不予理睬。醒后完全遗忘。该小儿发生了哪一种睡眠障碍？

网内收付业务差错处理，应坚持更改有据、（）的原则。业务差错只能由（）进行账务冲正处理，严禁交易行对确认成功的网内收付业务抹账或（）。

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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.

A. 4，2，1，3
B. 4，3，1，2
C. 2，4，3，1
D. 2，3，4，1