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【背景资料】在通风空调管道中经常用到天圆地方，下列是正心天圆地方时的侧视图与俯视图，制作天圆地方时，首先对天圆地方下料及展开，然后完成制作安装，回答下列问题：

请根据上述背景资料完成以下选项。其中判断题二选一（A、B选项），单选题四选一（A、B、C、D选项），多选题四选二或三（A、B、C、D选项）。

天圆地方与其他风管若采用法兰连接，法兰盘与风管的连接方式为（）。

A、咬口连接

B、铆接

C、热熔连接

D、丝扣链接

答案

参考答案：B

单项选择题

预防机械伤害的对策包括实现机械本质安全和提高操作人员安全素质两方面，其中，选择实现机械本质安全措施的最佳顺序是( )。

A．减少或消除接触机器的危险部件的次数一使人们难以接近机器的危险部位一提供保护装置或个人防护装备一消除产生危险的原因

B．消除产生危险的原因一提供保护装置或个人防护装备一减少或消除接触机器的危险部件的次数一使人们难以接近机器的危险部位

C．提供保护装置或个人防护装备一消除产生危险的原因一减少或消除接触机器的危险部件的次数一使人们难以接近机器的危险部位

D．消除产生危险的原因一减少或消除接触机器的危险部件的次数一使人们难以接近机器的危险部位一提供保护装置或个人防护装备
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单项选择题

A narrowing of your work interests is implied in almost any transition from a study environment to managerial or professional work. In the humanities and social sciences you will at best reuse only a fraction of the material (1) in three or four years’ study. In most career paths academic knowledge only (2) a background to much more applied decision-making. Even with a " training " form of degree, (3) a few of the procedures or methods (4) in your studies are likely to be continuously relevant in your work. Partly this (5) the greater specialization of most work tasks compared (6) studying. Many graduates are not (7) with the variety involved in (8) from degree study in at least four or five subjects a year to very standardized job (9) . Academic work values (10) inventiveness, originality, and the cultivation of self-realization and self-development. Emphasis is placed (11) generating new ideas and knowledge, assembling (12) information to make a " rational " decision, appreciating basic (13) and theories, and getting involved in fundamental controversies and debates. The humanistic values of higher (14) encourages the feeling of being (15) in a process with a self-developmental rhythm. (16) , even if your employers pursue enlightened personnel development (17) and invest heavily in " human capital " —for example, by rotating graduate trainees to (18) their work experiences—you are still likely to notice and feel (19) about some major restrictions of your (20) and activities compared with a study environment.

3（）

A.hardly

B.scarcely

C.evenly

D.only
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