在工件材料、刀具材料与切削条件一定的情况下，切削速度愈高刀具耐用度就（）

（3）完形填空

Older people must be given more chances to learn if they are to contribute to society rather than be a financial burden, according to a new study on population published recently.

The current approach which     21     on younger people and on skills for employment is not      22    to meet the challenge of demographic (人口结构的) change, it says. Only 1% of the education budget is currently spent on the oldest of the population.

　　 The      23     include the fact that most people can expect to spend a third of their lives in      24     , that there are now more people over 59 than under 16 and 11.3 million people are over state pension age.

　　“      25    needs to continue throughout life. Our historic concentration of policy attention and resources on young people cannot meet the new      26    ” says the report’s author, Professor Stephen.

　　The major portion of our education budget is spent on people below the age of 25. When people are changing their jobs, home , partners and lifestyles more often than ever , they need opportunities to learn at every age.      27    , some people are starting new careers in their 50s and later.

　　People need opportunities to make a “midlife review”to     28     to the later stage of employed life and to plan for the transition (过渡) to retirement, which may now happen    29                         at any point from 50 to over 90, says McNair.

　　And there should be more money      30     to support people in establishing a sense of identity and finding constructive roles for the “ third age”, the 20 or more years they will spend in healthy retired life.

21. A) operates       B) focuses      C) counts     D) depends

22. A) superior       B) regular      C) essential    D) adequate

23. A)regulations     B) obstacles     C) challenges  D) guidelines

24. A)enjoyment     B) retirement     C) stability    D) inability

25. A) Identifying    B) Learning      C) Instructing   D) Practicing

26. A) desires       B) aims             C) needs       D) intentions

27. A) For example   B) By contras    C) In particular       D) On average

28. A) transform     B) yield          C) adjust      D) suit

29 .A) unfairly      B) unpredictably    C) instantly   D) indirectly

30. A) reliable      B) considerable     C) available   D) feasible

患者男，60岁，头痛，前额部局部隆起。查体：前额隆起处可触及乒乓球样肿块，CT显示如下图。

鼻窦黏液囊肿的发病机制为（）

A.窦壁黏膜下腺体轻度炎症或变态反应

B.乳牙根管感染

C.龋齿使牙髓慢性感染坏死

D.鼻窦的自然开口长期阻塞

E.发病机制不清楚

F.窦腔开口变异

美发行业应用的假发制品中有（）、发片、发卷和发垫等。

A.发条

B.发包

C.发圈

D.发套

一般规定：少数民族夫妇可以生育()孩子，边境地区和自然环境恶劣的地区、人口特别稀少地区的少数民族夫妇，可以生育()孩子。

为什么寒冷地区先做完勒脚钸面再做散水？