最常见的肾盂肾炎病原菌是（ ）。A．葡萄球菌 B．粪肠球菌 C．大肠杆菌 D．变

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    Even facts "forgotten" by people during a busy day may be retrieved if this is followed by a good

night's sleep.

    Researchers from the University of Chicago asked volunteers to remember simple words . Many

found their memories letting them down towards the end of the day, but the following morning, those

who had slept well could recall much more.

    Researchers, writing in the journal Nature, said the brain could "rescue" lost memories during the

night.

    When the brain is first asked to remember something that memory is laid down in an "unstable" state,

meaning that it is possible that it could be lost . At some point, the brain consolidates those it deems

important into a "stable", more permanent state . However, the Chicago researchers suggested that it

was possible for a "stable" memory to be made "unstable" again . This would mean that memories

could be modified then filed away again in the face of new experiences.

    The 12 volunteers tested in the experiment were played words created through a speech synthesizer

which were purposely difficult to understand . Initially, the written version of the word  from the audio

version only . Tests revealed that the ability to recall the right word tended to tail off as the day ended.

    However, when the volunteers were retested after a good night's sleep, they were able to recall

some words that they had " forgotten" the previous evening.

    Dr Daniel, one of the study authors, said: "Sleep consolidates memories, protecting them against

subsequent interference or decay . Sleep also appears to "recover" or restore memories." He said: "If

performance is reduced by decay, sleep might actively recover what has been lost."

   Dr Karim Nader, from the Department of Psychology in McGill University in Montreal, said:

"Memory research is undergoing a transformation-no longer is memory thought to be a hard-writing

of the brain, instead it seems to be a process of storage and restorage."

    Sleep helps some memories "mature" and also prunes out unimportant memories.

1. What does the first paragraph implies?

A . A busy day makes people forget things easily.

B . People need a good night's sleep after a busy day.

C . A good night's sleep helps memories.

D . A good night's sleep helps people forget a busy day.

2 . The words the 12 volunteers played in the experiment were not ____

A . created through a speech synthesizer

B . hard to understand

C . available at the beginning

D . designed to test people's ability of understanding

3 . According to the passage, memory_____

A . is a hard-writing of the brain

B . is not a process of storage

C . is not a process of restorage

D . will be mature with the help of sleep

4 . Which of the following is NOT true?

A . When people first remember something, the memory is in an "unstable state".

B . The brain will change those important unstable memories into stable.

C . Once the memory become stable, it will never become unstable again.

D . Sleep can protect memories from being harmed.

单位、个人和银行都应当按照《人民币银行结算账户管理办法》的规定开立、使用账户。()

急性出血坏死性胰腺炎最常见的并发症是（）

A.ARDS

B.休克

C.急性肾衰竭

D.胰腺周围脓肿

E.胰腺假性囊肿

简述局级生产指挥系统功能模块。

何谓基础埋深？选择基础埋深时应考虑哪些主要因素？