以下哪种病变增强CT检查对有帮助（）A、胆囊结石B、肺间质纤维化C、泌尿系结石D、肝

额定速度不大于2.5m/s的电梯,运行时机房最大噪声不大于()

A.55

B.80

C.65

D.70

患者女性，38岁。左睑下垂伴视物成双1周，晨轻暮重。头不痛，不发热。无咀嚼吞咽困难，无四肢无力，无呼吸困难。检查：双瞳孔2.5mm，对光反应正常，左睑下垂，左眼球上视、外展和下视无力，右眼上、下视、内收及外展均受限，向各方向注视均有复视，其余神经系统未见异常。

该患者最可能的诊断是（）

A.双眶上裂综合征

B.动脉瘤

C.海绵窦血栓形成

D.重症肌无力

E.格林巴利综合征

头颅CT出现如图所示脑梗死，该病灶最可能是下列哪条阻塞引起（）

A.大脑前动脉主干

B.颈内动脉主干

C.大脑中动脉主干

D.脉络膜前动脉

E.豆纹动脉

(D)

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 form 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.

According to Paragraph 1, why did the plan of Jacobs family fail（）

A. The twins wasted too much money.

B. The father was out of work.

C. Their savings ran out.

D. The family fell apart.

多形性胶质母细胞瘤的典型CT表现为（）

A.病灶不均质强化

B.花环样环状强化

C.病灶边缘不锐利

D.占位效应较重

E.病灶内钙化