问题 单项选择题

下列选项中均可引起皮质醇增多(Cushing综合征)的是()

A.肾上腺增生,嗜铬细胞瘤,肾上腺皮质腺瘤

B.肾上腺腺瘤,嗜铬细胞瘤,肾上腺皮质腺瘤

C.肾上腺增生,肾上腺腺瘤,肾上腺皮质腺癌

D.肾上腺腺瘤,肾上腺增生,肾上腺髓样脂肪瘤

E.肾上腺腺瘤,转移癌,囊肿

答案

参考答案:C

解析:Cushing综合征为肾上腺分泌过多糖皮质激素(皮质醇)。皮质醇主要由肾上腺皮质束状带细胞分泌,肾上腺髓样脂肪瘤及囊肿不会引起皮质醇增多。嗜铬细胞瘤发生于肾上腺髓质,释放大量儿茶酚胺,而不是皮质醇。排除ABDE,C项均可引起皮质醇增多

阅读理解

阅读理解。

     Diana Jacobs thought her family had a workable plan to pay for college for her 21-year-old twin sons:

a combination of savings, income, scholarships, and a modest amount of borrowing. Then her husband

lost his job, and the plan fell apart.

     "I have two kids in college, and I want to say'come home,' but at the same time I want to provide

them with a good education," says Jacobs.

     The Jacobs family did work out a solution: They asked and received more aid from the schools, and

each son increased his borrowing to the maximum amount through the federal loan (贷款) program. They

will each graduate with $20,000 of debt, but at least they will be able to finish school.

     With unemployment rising, financial aid administrators expect to hear more families like the Jacobs.

More students are applying for aid, and more families expect to need student loans. College administrators

are concerned that they will not have enough aid money to go around.

     At the same time, tuition (学费) continues to rise. A report from the National Center for Public Policy

and Higher Education found that college tuition and fees increased 439% from 1982 to 2007, while average

family income rose just 147%. Student borrowing has more than doubled in the last decade.

      "If we go on this way for another 25years, we won't have an affordable system of higher education,"

says Patrick M. Callan, president of the center. "The middle class families have been financing it through

debt. They will send kids to college whatever it takes, even if that means a huge amount of debt."

     Financial aid administrators have been having a hard time as many companies decide that student loans

are not profitable enough and have stopped making them. The good news, however, is that federal loans

account for about three quarters of student borrowing, and the government says that money will flow

uninterrupted.

1. How did the Jacobs manage to solve their problem?

A. They asked their kids to come home.

B. They borrowed $20,000 from the school.

C. They encouraged their twin sons to do part-time jobs.

D. They got help from the school and the federal government.

2. Financial aid administrators believe that _____.

A. more families will face the same problem as the Jacobses

B. the government will receive more letters of complaint

C. college tuition fees will double soon

D. America's unemployment will fall

3. What can we learn about the middle class families from the text?

A. They blamed the government for the tuition increase.

B. Their income remained steady in the last decade.

C. They will try their best to send kids to college.

D. Their debts will be paid off within 25 years.

4. According to the last paragraph, the government will _____.

A. provide most students will scholarships

B. dismiss some financial aid administrators

C. stop the companies from making student loans

D. go on providing financial support for college students

单项选择题