When I was growing up, I was embarrassed t

下列选项中，属于鸭嘴单孔型喷嘴的是（）。

A、BWJ喷嘴

B、KH型喷嘴

C、LPC型喷嘴

D、SY型喷嘴

It is often said that politeness costs nothing．In fact，it seems that a little more courtesy could save businesses￡5 billion every year．

Frequently hearing the phrase “thank you” or “well done” means the same to staff as a modest pay rise，researchers say．

Praise and encouragement also makes employees more likely to work hard and stay in their jobs，saving on the cost of finding replacements．

A third of 1,000 workers surveyed by consulting firm White Water Strategies said they did not get thanked at all when they did well—and a further third said they were not thanked enough．

In both cases，staff said they felt undervalued，meaning they were less likely to exert themselves and were more likely to look for employment elsewhere．

The net result is around ￡5.2 billion in lost productivity from employees who would raise their game if they felt more appreciated，White Water claimed According to the company，praising staff has the same motivational kick as a 1 per cent pay rise—and works out much cheaper for bosses．

Three out of four employees said that regular acknowledgement by their boss was important to them，but only a quarter said they were actually given as much praise as they felt they needed．

The survey found that those in blue-collar and manual jobs were less likely to be given any recognition for doing well．

In regional terms，Scottish staff felt most undervalued．Four out of ten workers said they were never thanked and eight out of ten said they would like more praise．However，workers in the North-East are less impressed by being buttered up by the boss，as only 69 per cent said they felt the need to be told “well done” regularly．

Older employees and women need the most reassurance，according to psychologist Averil Leimon，a director of White Water Strategies．She said that words of praise did more than create a pleasant place to work—they could even boost profits．

51．The second paragraph means that_____________.

A．employees ask for high pay instead of hearing “thank you” or “well done”

B．bosses always think highly of their employees’ work

C．bosses’ praise and encouragement are important to workers

D．bosses should praise their workers from time to time

52．Why praise and encouragement are needed according to the passage?

A．Most bosses feel it necessary

B．Most workers didn’t work hard enough.

C．Most bosses can make money from praise and encouragement

D．Most workers will work harder and stay in their jobs from praise and encouragement.

53．According to tiffs passage，the majority of staff felt______________．

A．there were thanked enough        B．they were undervalued

C．they got satisfactory pay        D．they didn’t need encouragement

54．Which of the following is TRUE according to the passage?

A．Blue-collar and manual workers need more regular acknowledgement by their bosses．

B．A third of the workers surveyed by White Water Strategies never got thanked at all when

they did well．

C．Old employees and women do not need to be appreciated as much as the young．

D．Fewer than 20％ of Scotiish felt that they never got thanked．

55．The main idea of the passage is that___________

A．praise and encouragement may help employees work better

B．workers are always demanding more praise and encouragement

C．bosses in Scotland usually praise and encourage their staff enough

D．if undervalued employees will certainly look for employment elsewhere

一般将下列哪项称为有临床意义的病变（）

A.冠状动脉狭窄大于50%（直径）

B.冠状动脉狭窄大于45%（直径）

C.冠状动脉狭窄大于40%（直径）

D.面积减少超过70%

E.面积减少超过60%

间歇挡工作不正常，如何排除？

受境内外汇资金相对短缺影响，境内市场外汇利率通常（）境外市场利率。

A.高于

B.等于

C.低于

D.无关于