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问题 单项选择题

当研究者对研究的总体情况比较熟悉、分析判断能力较强、研究方法与技术十分熟练、研究经验比较丰富时，往往采用( )的方法比较方便。

A．主观抽样

B．整群抽样

C．分层抽样

D．定额抽样

答案

参考答案：A

解析： 主观抽样，也称目标式抽样、判断式抽样或立意抽样。它是调查者根据研究的目标和自己主观的分析，来选择和确定调查对象的方法。主观抽样取得的样本，其代表性取决于研究者对总体的了解程度和判断能力。其优点是，可以充分发挥研究人员的主观能动性，特别是当研究者对研究的总体情况比较熟悉、分析判断能力较强、研究方法与技术十分熟练、研究经验比较丰富时，采用这种方法往往十分方便。故选A。

单项选择题

以下疗法，对于二、三期内痔，尤其对纤维性内痔更为适宜的是：

A．贯穿结扎法

B．挂线疗法

C．直肠周围注射法

D．枯痔钉疗法

E．中药外洗
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填空题

When you stop and think about your high school or college alma mater, were your experiences more positive or negative Do your feelings of (1) in that school have anything to do with whether or not your school was single-sex or coed (2) to send their children to single-sex schools, because they feel both (3) when they study in the company of students of the same sex. They (4) .
For years, only parents who could afford to send their children to private schools, or who had (5) , chose single-sex education for their children. Single-sex schooling was (6) for most American families. Today, however, along with (7) , public schools are experimenting with the idea of (8) .
Girls may be the ones who benefit most from single-sex schooling. Studies have shown that (9) in coed classrooms because teachers sometimes pay more attention to boys. Girls’ (10) toward their studies tends to disappear as they begin to feel less successful. They start to (11) outperform them in math and science. As boys (12) , girls start to lose it. Moreover, adolescence is (13) for girls. As they experience adolescent changes, some girls become depressed, develop an addiction, or suffer from (14) .
In the early 1990s, some influential people said that being in single-sex classes could (15) . Schools across the country began creating single-sex classrooms and schools. But many critics claim that (16) may actually be detrimental to a girl’s education because they (17) of sex differences.
The renewed interest in single-sex schooling (18) among Americans. Those who give it full endorsement believe girls need an all-female environment to take risks and find their own voices. Those who (19) of single-sex schooling wonder whether students’ lack of achievement warrants returning to an educational system that divides the sexes. They believe there is no (20) .
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