斑驳陆离bün bï lù lí：斑驳

如图所示，在竖直向上的恒力F作用下，物体A、B一起向上做匀加速运动。在运动过程中，物体A保持和墙面接触，物体B紧贴在A的下表面，A和B相对静止，则下列说法正确的是（    ）

A．竖直墙面对物体A有摩擦力的作用

B．如果物体运动的加速度较小，则物体A、B间可以没有摩擦力作用

C．物体B受到4个力作用

D．因为有向上的加速度，所以A、B处于超重状态，恒力F一定大于物体A和B受到的重力之和

第三部分阅读理解（共15小题；每小题2分，满分30分）

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳答案。

Governors, lawyers and business leaders have to deal with scientists, and every educated person finds his views affected by science. Yet our science teaching of non-scientists, in school and college, has built up mistaken ideas, dislikes, and the common boast(自夸), "I never did understand science." Even those students who arrive at colleges with plans to become scientists usually bring a mistaken picture of science: some have a collection of unorganized facts about science, and some regard the study of science as a game which includes getting the right answer.

The first of these attitudes seems to come from a kind of course which provides various kinds of information; the second, from a training course on how to pass examinations that do not ask about the student's understand but simply require him to put the numbers in the right formula(公式). Neither type of courses in school or college seems to give students an understanding of science as we find it among scientists. Neither shows students how real scientists work and think, how the facts are gathered, how discoveries are made, and what they mean. Young people need good teaching of science, not so much as great wealth of knowledge as a healthy understanding of the nature of science. They need an understanding of knowledge leading to agreement with science and an eagerness of the way scientists work. Given these it is easy to encourage later reading and learning.

56. One of the reasons that cause mistaken ideas of science is due to _______.

A. a mistaken picture in students' mind       

B. the unscientific way of teaching of science

C. the fact that students fail to see the influence of science

D. the fact that students have a collection of unrelated facts about science

57. According to the passage, we can safely say that the subject of the passage is ______.

A. need for good science teaching              

B. young people should form a correct attitude to science

C. students must know what science is and how scientists work and think

D. every person, including governors, lawyers and business leaders should study science

58. A good course of science is ______.

A. to provide students with all kinds of information

B. to teach students to do things according to formulas

C. to help students have a good understanding and form a correct attitude to science

D. to encourage students to make themselves masters of knowledge

59. People such as governors, lawyers and business leaders deal with scientists mainly because ______.

A. scientists are great persons                           

B. they owe much to scientists' contributions

C. they can be affected by scientists when they are together

D. scientists make discoveries and help people live a more comfortable and safer life

某学校组织一批学生乘坐汽车出去参观，要求每辆车上乘坐的学生人数相同，如果每辆车乘20人，结果多3人；如果少派一辆车，则所有学生正好能平均分乘到各车上，已知每辆汽车最多能乘坐25人，则该批学生人数是( )。

A．583
B．483
C．324
D．256

下面哪一项不是蒯通所认为的看相的三点要素之一？（）

A、骨相

B、容貌气势

C、切脉

D、决断力

在链表的运算过程中，能够使空表与非空表的运算统一的结构是______。