标准系统脱盐率下降()或产品水含盐量明显增加说明反渗透膜需要清洗。A、1%~2% B

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问题:

标准系统脱盐率下降()或产品水含盐量明显增加说明反渗透膜需要清洗。

A、1%~2%

B、2%~3%

C、3%~4%

考点:脱盐水岗位考试脱盐水岗位考试题库
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厥证与昏迷均有意识丧失,下列何项不符合厥证诊断

A.突然发生

B.发生缓慢

C.持续时间长

D.持续时间短暂

E.醒后原发病仍存在

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患者,女,36岁,已婚。半年来每逢经后两乳作胀,腰膝酸软,两目干涩,咽干口燥,五心烦热,舌红少苔,脉细数。治疗应首选

A.调肝汤

B.逍遥散

C.一贯煎

D.丹栀逍遥散

E.柴胡疏肝散

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常用的数据结构模型有层次模型、网状模型、______和面向对象模型。

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阅读理解。

     The Queen's English is now sounding less upper-class, a scientific study of the Queen's Christmas

broadcasts had found. Researchers have studied each of her messages to the Commonwealth countries

since 1952 to find out the change in her pronunciation from the noble Upper Received to the Standard

Received.

     Jonathan Harrington, a professor at Germany's University of Munich, wanted to discover whether

accent (口音) changers recorded over the past half century would take place within one person. "As far

as I know, there just is nobody else for whom there is this sort of broadcast records," he said.

     He said the noble way of pronouncing vowels (元音) had gradually lost ground as the noble upper-

class accent over the past years. "Her accent sounds slightly less noble than it did 50 years ago. But these

are very, very small and slow changes that we don't notice from year to year."

     "We may be able to relate it to changes in the social classes," he told The Daily Telegraph, a British

newspaper. "In 1952 she would have been hears saying 'thet men in the bleck het'. Now it would be 'that

man in the black hat'. And 'hame' rather than 'home'. In the 1950s she would have been 'lorst', but by the

1970s 'lost'."

     The Queen's broadcast is a personal message to the Commonwealth countries. Each Christmas, the

10-minute broadcast is put on TV at 3 pm in Britain as many families are recovering from their traditional

turkey lunch. (传统火鸡午餐).

     The results were published (发表) in the Journal of Phonetics.

1. The Queen's broadcasts were chosen for the study mainly because _____.

A. she has been Queen for many years

B. she has a less upper-class accent now

C. her speeches are familiar to many people

D. her speeches have been recorded for 50 years

2. Which of the following is an example of a less noble accent in English? 

A. "duaty"

B. "citee"

C. "hame"

D. "lorst"

3. We may infer from the text that the Journal of Phonetics is a magazine on _____.

A. speech sounds

B. Christmas customs

C. TV broadcasting

D. personal messages

4. What is the text mainly about?

A. The relationship between accents and social classes.

B. The Queen's Christmas speeches on TV.

C. The changes in a person's accent.

D. The recent development of the English language.

题型:单项选择题

简述简单随机抽样的含义和具体分类。

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