下列属于直接费的有( )。A．人工费 B．材料费 C．规费 D．企业管理费 E．施

若一系列函数的解析式相同，值域相同，但定义域不同，则称这些函数为“孪生函数”，那么函数解析式为y=2x²-1，值域为{1，7}的“孪生函数”共有[ ]

A．10个

B．9个

C．8个

D．4个

Passage One

Most students arrive at college using" discrete, concrete and absolute categories to understand people, knowledge, and values. " These students live with a dualistic view, seeing "the world in polar terms of we-right-good vs. other-wrong-bad. " These students cannot acknowledge the existence of more than one point of view toward any issue. There is one "right" way. And because these absolutes are assumed by or imposed on the individual from external authority, they cannot be personally substantiated or authenticated by experience. These students are slaves to the generalizations of their authorities. An eye for an eye! Capital punishment is apt justice for murder. The Bible says so.

Most students break through the dualistic stage to another equally frustrating stage—multiplicity. Within this stage, students see a variety of ways to deal with any given topic or problem. However, while these students accept multiple points of view, they are unable to evaluate or justify them. To have an opinion is everyone’s right. While students in the dualistic stage are unable to produce evidence to support what they consider to be self-evident absolutes, students in the multiplistic stage are unable to connect instances into coherent generalizations. Every assertion, every point, is valid. In their democracy they are directionless. Capital punishment What sense is there in answering one murder with another

The third stage of development finds students living in a world of relativism. Knowledge is relative: right and wrong depend on the context. No longer recognizing the validity of each individual idea or action, relativists examine everything to find its place in an overall framework. While the multiplist views the world as unconnected, almost random, the relativist seeks always to place phenomena into coherent larger patterns. Students in this stage view the world analytically. They appreciate authority for its expertise, using it to defend their own generalizations. In addition, they accept or reject ostensible authority after systematically evaluating its validity. In this stage, however, students resist decision making. Suffering the ambivalence of finding several consistent and acceptable alternatives, they are almost overwhelmed by diversity and need means for managing it. Capital punishment is appropriate justice—in some instances.

In the final stage students manage diversity through individual commitment. Students do not deny relativism. Rather they assert an identity by forming commitments and assuming responsibility for them. They gather personal experience into a coherent framework, abstract principles to guide their actions, and use these principles to discipline and govern their thoughts and actions. The individual has chosen to join a particular community and agrees to live by its tenets. The accused has had the benefit of due process to guard his civil rights, a jury of peers has found him guilty, and the state has the right to end his life. This is a principle my community and I endorse.

In paragraph two, the author states that in their "democracy" students in the multiplicity stage are directionless. The writer describes multiplicity students as being in a "democracy" because （）.

A．there are so many different kinds of people in a democracy

B．in an "ideal" democracy, all people are considered equal; by extension, so are their opinions

C．Democrats generally do not have a good sense of direction

D．in a democracy the individual has ultimate authority over himself, not the state

浓缩机在有严重噪音情况下机械振动故障的原因及处理方法？

当临街的被拆除建筑与交通道路的安全距离不能满足要求时，必须采取相应的安全隔离措施。

有关植皮手术，以下哪些是正确的（）.

A.薄皮片更易于成活

B.中厚皮片更易于成活

C.全厚皮片更易于成活

D.薄皮片成活后收缩率较小

E.中厚皮片成活后收缩率较小