某HBsAg阳性患者，为确定其是否具有传染性，应首先检查()A．抗HBs B．HBe

某人辞去月薪5 000元的工作，取出自有存款200 000元(月息0.1%)，创办一家企业，如果不考虑商业风险，则他自办企业按月计算的机会成本是( )。

A．7 000元

B．9 000元

C．25 000元

D．205 000元

由非圆方程曲线y=f（x）组成的平面轮廓，编程时数值计算的主要任务是求各坐标（）。

A、节点；

B、基点；

C、交点；

D、切点

A new college guide in the United States compares educational requirements in seven subjects. These include math, science, writing and United States history or government. The other subjects are economics, foreign language and literature.

The free online guide is from the American Council of Trustees and Alumni. The council is a nonprofit group that supports liberal arts education.

Its president, Anne Neal, says these areas of knowledge are needed to succeed in a twenty-first century society and an increasingly connected world. Yet she told VOA’s Faiza Elmasry it was surprising how many students can graduate with, in her words, a “thin education.”

Forty-two of the one hundred colleges and universities surveyed received the lowest marks. This meant they required two or fewer of the seven subjects. Five schools received a top grade for requiring six subjects. These were Brooklyn College in New York City, Texas A&M, the University of Texas-Austin, West Point and the University of Arkansas.

Robert Costrell is a professor of education reform and economics at the University of Arkansas. He says many, if not all, of the top American colleges once had a core curriculum —a set of courses required for all students.

But over the years, many have dropped these requirements. Or they have watered them down, Professor Costrell says, into what became known as distribution requirements. This system lets a student choose from a number of different courses to satisfy a requirement.

ROBERT COSTRELL: “And in many cases these courses went too far, I would say, towards the fluffy treatment of serious material, and students could satisfy their requirement by taking such courses.”

Professor Costrell says schools should not only re-examine what they teach. They should also measure what students have learned — for example, through some form of examinations or papers.

A new report this week from the College Board showed that college prices continue to rise. But Anne Neal from the American Council of Trustees and Alumni says higher prices do not guarantee a better general education. In fact, the group found that the higher the tuition, the more likely that students have to develop their own general education.

The college guide is on the Web at whatwilltheylearn.com. Anne Neal says her group is surveying more colleges. The hope, she says, is to discover what college graduates have really learned, and how ready they are to compete in the global marketplace.

67. Where does the passage probably come from?

A. A scientific fiction.                      B. A research newspaper.  

C. A fashion magazine.                     D. An entertainment newspaper.

68. The American Council of Trustees and Alumni does all the following EXCEPT _________.

A. support liberal arts education

B. concern itself with education in America

C. devote time to helping improve college education

D. make money by helping with college education

69. The words “watered them down” underlined in Paragraph 6 most likely mean “_______.”

A. reduced required courses                 B. improved required courses

C. increased required courses                D. developed required courses

70. In this passage, the new college guide mainly tells its readers that American colleges  should ______.

A. meet the requirements of the new century

B. reduce the number of required courses

C. have different standards on required courses

D. cut down on their tuitions

为了验证胚芽鞘尖端确实能产生某种促进生长的物质，用胚芽鞘和琼脂块等材料进行实验时，对照实验的设计思路是（）

A.完整胚芽鞘分别置于单侧光照射和黑暗条件下

B.胚芽鞘尖端和未处理的琼脂块分别置于胚芽鞘切面的同一侧

C.未放过尖端的琼脂块和放过尖端的琼脂块分别置于胚芽鞘切面的同一侧

D.胚芽鞘尖端和放过胚芽鞘尖端一段时间后的琼脂块分别置于胚芽鞘切面的同一侧

（）是认识过程的最高阶段。

A.思维

B.行动

C.礼仪

D.能力