已知集合A={x|2x+1≥0},集合B={x|x2-(a+1)x+a<0},若

题型:解答题

问题:

已知集合A={x|2x+1≥0},集合B={x|x2-(a+1)x+a<0},若A∪B=B,求实数a的取值范围.

考点:集合间交、并、补的运算(用Venn图表示)
题型:解答题

牙周炎的相关致病菌有

A.牙龈卟啉菌

B.变形链球菌

C.螺旋体

D.血链球菌

E.放线共生放线杆菌

题型:解答题

患者26岁,人工流产后1年无月经来潮,子宫附件未发现异常,孕激素试验(-),基础体温双相,用人工周期治疗3个月仍不见月经来潮,其闭经的可能原因为

A.子宫内膜损伤

B.卵巢病变

C.垂体病变

D.丘脑病变

E.精神因素

题型:解答题

阅读理解。

      It was a warm April day when a big fat envelope came in the mail from the only college I had ever

imagined attending. I tore open the packet. My eyes were fixed on the word "congratulations."I don't

remember ever smiling so wide.

     Then I looked at my financial (财政的) package.

     The cost of Dream School's tuition (学费), room and board was around $ 40,000- an impossible sum!

How could I afford to attend? What good reasons did I have to go there when three other fine colleges

were offering me free tuition? My other choices were good, solid schools even if they weren't as famous

as my first choice.

     In my mind, attending my dream university would be the only way to realize my dream of becoming a

world-class writer. My parents understood how I felt. They told me that even though it would be a financial

problem, I could go wherever I would be happiest. But as I was always careful with money, I wasn't sure

what to do.

     One of the schools that offered me a full ride had an informational dinner one night in the spring.

to do was smile politely, eat free food, listen quietly. But I surprised myself.

     At dinner the president of the university talked about the wonderful activities on campus (校园) including

guest lectures and social gatherings. He also made it perfectly clear that free food would be offered at all

future events. He continued with explanations of professors, class sizes, activities, and sporting events on

campus. As he spoke, I began to realize that this school, though not as good as my first choice, might be the

best one for me. It seemed small yet with many great programs. It seemed challenging yet caring.

     As the president ended his speech, we clapped politely and pushed back our chairs. As I walked out that

door, a feeling of comfort washed over me. Looking at the campus that night, I realized that I would be

spending the next four years right there.

     In all honesty, my university is not as well-known as my "dream" university. However, it turned out to be

the right choice of schools for me.

1. How did the author feel when he started to read the letter?

A. He was full of joy.

B. He was lost in his dream.

C. He was worried about the money.

D. He was uncertain which school to go to.

2. We can learn from the passage that the parents were ______.

A. honest

B. strict

C. supportive

D. decisive

3. In Paragraph 5, "offered me a full ride"can be replaced by "_______".

A. would pay for transport to the school

B. would show me around the campus

C. would offer free meals at all events

D. would charge me nothing for tuition

4. What does the author mainly want to say?

A. Your second-choice college may actually by your best fit.

B. You should consider comfort in your choice of schools.

C. You should try your best to attend your dream school.

D. Your choice of schools should be based on their fame.

题型:解答题

简述何为跑单及如何对跑单进行处理?

题型:解答题

开放式基金的基金合同应当约定每年基金收益分配的()。

A.最多次数

B.最低比例

C.最高金额

D.最低标准

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