起锚机应具有足够的功率，但不必能连续工作。

不回电的轨道与架线电机车回电轨道之间，必须加（）

A、绝缘

B、木板

C、道岔

某写字楼建筑给水系统，二次加压水泵从储水池抽水，其吸水管和压水管总长为50.00m，自储水池最低水位至配水最不利点的高度为36.00m，若自水泵吸水管路至配水最不利点之间的水头损失为3.15mH₂O，水表的水头损失为1.35mH₂O，配水最不利点所需的流出水头为30kPa，室外给水管网所提供的压力为180kPa，则水泵的最小扬程为______kPa。

A．541.5
B．421.5
C．42.15
D．521.5

3岁，男孩，被母亲牵拉右手上台阶时突然哭闹，拒绝使用右上肢。

最可能查到的阳性体征是

A．肘关节肿胀

B．肘后三角关系异常

C．Dugas征(+)

D．桡骨头压痛

E．肘内翻

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.

4（）

A.practiced

B.described

C.encountered

D.analyzed

中国第一颗原子弹是在什么地方爆炸的？