管理的本质是为了( )。A．合理有效地利用资源 B．提高劳动生产率 C．制订科学的

关于安培力和洛伦兹力，下列说法中正确的是（　　）

A．带点粒子在磁场中运动时，有可能不受洛伦兹力的作用

B．洛伦兹力对运动电荷一定不做功

C．放置在磁场中的通电直导线，一定受到安培力作用

D．放置在磁场中的通电直导线，有可能不受安培力作用

阅读理解。

     根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

     The need for love is deeply rooted in the human psyche(灵魂).    1   Separateness, according to

psychologists, means to be cut off, helpless and alone in the world. It is the source of all anxiety.

       2   It can be selfish and possessive, or unselfish and giving. Abraham Maslow distinguishes between

two kinds of love: B-love or "being love" means love for another person: unselfish love not dependent

upon your own needs. D-love or "deficiency-love" is a selfish possessive love which is based upon

someone else's ability to satisfy your needs.

     D-love is conditional. It depends upon whether personal needs continue to be met…But B-love is

unconditional.    3   Furthermore, as it depends upon who you are, it is possible only when you allow

yourself to be known to the other person.

     The psychologist Erich Fromm also distinguished between two types of love.    4   Symbiotic union

is an immature love based upon the satisfaction of needs and is similar to Maslow's concept of D-love.

Mature love, on the other hand, is a relationship that allows individuals to retain(保持) their independence, their identity, and their integrity. In mature love people can overcome their sense of separateness yet

continue to be themselves. The mature lover would say , "I love you because I need you," but the mature

one: "   5   "

A. There are two types of love.

B. I need you because I love you.

C. Love is a way of overcoming the feeling.

D. Every one of us needs love.

E. It depends not upon what you do, but who you are.

F. They are immature love, called by him symbiotic union(共同体), and mature love.

G. These two types are quite different from each other.

孙思邈不仅认真学习，而且在碰到疑难病无法治疗时，也从不畏缩，而是勤于思考，深入研究，尽力找出治疗的办法。有一次，一个病人得了尿闭症（尿潴留）不能小便，急忙找来孙思邈治疗。孙思邈看他的小肚子涨得那么厉害，心想，吃药怕来不及了，便想找一根管子插进 * * 试验。想到葱管又空而且又软又细，不妨用它来试试，便要了一根细葱，在葱叶的一头切去少许，细心地慢慢地插进了病人的 * * ，再用劲一吹，不一会儿，尿果然沿着葱管流了出来，病人胀大的小肚子慢慢地瘪了下去，病人尿闭症的痛苦顿时消失。孙思邈是最早使用导尿术治疗尿潴留的人。这体现了孙思邈哪方面的医德品格（）

A.赤诚济世

B.勇于创新

C.淡泊名利

D.舍己救人

E.不怕艰苦

"有效的控制系统应是合理的、适用的"体现的控制特征是（）

A.合理性

B.灵活性

C.适用性

D.战略高度

E.多重标准

变压器停电时（）。

A、先停电源侧，后停负荷侧

B、先停负荷侧，后停电源侧

C、根据情况确定