全部受试对象应按_________方法分配封各组中去A.配对设计方法 B.完全随机化

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问题:

全部受试对象应按_________方法分配封各组中去

A.配对设计方法

B.完全随机化的方法

C.配伍组设计方法

D.拉丁方设计方法

E.正交设计方法

考点:药学职称考试药师专业实践能力临床实验设计
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纤维蛋白降解产物的主要作用是

A.促进凝血酶的活性

B.防止血小板的激活

C.对抗血液凝固

D.促进纤维蛋白单体聚合

E.抑制纤维蛋白溶解

题型:单项选择题

雄伟壮观的东江大坝位于我市资兴境内,请根据你对水电站的了解和所学到的物理知识,从力、势、电、光四个方面回答下面的问题.

(1)力学问题:水电站的大坝修成上窄下宽的形状,这是因为水内部的压强和水的   有关,大坝下部受到水的压强   (填“大于”、“小于”或“等于”)上部受到的压强,所以下部要修得宽一些.

(2)热学问题:库区蓄水后,因为水的   较大,所以库区的气温变化不明显.湖面上经常可以欣赏到“雾漫东江”的美景,其中“雾”的形成是   现象(填物态变化的名称).

(3)电学问题:发电机是利用了   的原理发电的,将机械能转化为   能.

(4)光学问题:在平静的湖面上可以看到“蓝天”、“白云”,这是由于下列哪种现象形成的    

A.光沿直线传播   B.光的反射   C.光的折射.

题型:单项选择题

袋子里有红色和蓝色的袜子各4只,明明至少拿出______只袜子才能配成一双蓝袜子.

题型:单项选择题

学习困难

题型:单项选择题

Proper arrangement of classroom space is important to encouraging interaction. Most of us have noticed how important physical setting is to efficiency and comfort in our work. College classroom space should be designed to encourage the activity of critical thinking. We may be approaching the twenty-first century, but step into almost any college classroom and you step back in time at least a hundred years. Desks are normally in straight rows, so students can clearly see the teacher but not all their classmates. The assumption behind such an arrangement is obvious. Everything of importance comes from the teacher.
With a little imagination and effort, unless desks are fixed to the floor, the teacher can correct this situation and create space that encourages interchange among students. In small or standard-size classes, chairs, desks, and tables can be arranged in a variety of ways. The primary goal should be for everyone to be able to see everyone else. Larger classes, particularly those held in lecture halls, unfortunately, allow much less flexibility.
Arrangement of the classroom should also make it easy to divide students into small groups for discussion or problem-solving exercises. Small classes with movable desks and tables present no problem. Even in large lecture halls, it is possible for students to turn around and form groups of four to six. Breaking a class into small groups provides more opportunities for students to interact with each other, think out loud, and see how other students’ thinking processes operate all essential elements in developing new modes of critical thinking. In courses that regularly use a small group format, students might be asked to stay in the same small groups throughout the course. A colleague of mine, John, allows students to move around during the first two weeks, until they find a group they are comfortable with. John then asks them to stay in the same seat, with the same group, from that time on. This not only creates a comfortable setting for interaction but helps him learn students’ names and faces.

The expression "step back in time at least a hundred years" (in Paragraph 1) is intended to convey the idea that ______.

A. college classrooms often remind people of their college life
B. critical thinking was encouraged even a century ago
C. a hundred years ago, desk arrangement in a classroom was quite different
D. there is not much change in educational idea over the past hundred years

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