1~10所有质数的和是( ) A.12 B.17 C.18 D.25

题型:选择题

问题:

1~10所有质数的和是(  )

A.12

B.17

C.18

D.25

考点:质数,互质数,分解质因数,合数
题型:选择题

患者,男,28岁,拟诊为慢性肾炎多年,发热、咽痛少尿1周,鼻出血1天入院。体检:血压:180/105mmHg,血红蛋白50g/L,尿蛋白(+),大便隐血(±),血肌酐850μmol/L。

提示:患者院内血压持续升高,经应用硝苯地平缓释片、吲哚帕胺片等降压药物治疗血压未见明显下降。提问:此时控制血压最好药物是()

A.转换酶抑制剂

B.α受体阻滞剂

C.镇静剂

D.β受体阻滞剂

E.利尿剂

题型:选择题

资产组合理论表明,证券组合的风险随着组合所包含的证券数量的增加而降低,资产间关联性低的多元化证券组合可以有效降低个别风险。()

题型:选择题

阅读理解

     The "aha moment"(顿悟时刻) for Arjun Nagendran came one recent afternoon while he was cleaning up the muddy paw prints, and his pet dog, Rocky, was tracking across the house "again".

    "Why not make shoes for dogs?" the 10-year-old boy thought. For most kids, the moment might have

ended right here. But for Arjun and five of his classmates from Littleton School, an accidental idea proved

talent when they won first place at the first-ever Student Inventors Day at the Liberty Science Center in

Jersey City. The winning invention, "Green Paws"-an eco-friendly dog shoe made from bark, three leaves and recycled rubber-got the group a $1,000 prize, two television appearances and a shot at being the

next "As Seen on TV" hit product.

    More than 20 schools, most of them from New Jersey, gathered at the center to show their green

inventions. Each team had 10 minutes to introduce their inventions to the judges. In the end, the chief

judge Khubani announced that it was the Green Paws product that stood out, particularly because his

company had been looking into the very idea of how to keep paws clean.

    Pet products are usually popular sellers, he said, noting that his company has marked four new pet

inventions this year alone. And while his senior managers had put forward the idea of new paw wipes,

they had never thought of pet shoes, he said.

    "We thought about cleaning pets' paws, but we never thought about keeping them clean in the first

place." Khubani said after the event. "They actually have an idea that is marketable." The company will

begin conducting market research on Green Paws this week, he said. But Arjun and his team will have to

put off another day before they receive congratulations from their classmates.

1.What is the direct reason for Arjun's inventing "Green Paws"?

A. That his school inspired students to join in the invention competition

B. That Khubani's company invited him and his classmates to invent it

C. That his pet dog made the floor dirty with dirty paws

D. That his parents encouraged him to be a great inventor

2.The underlined sentence in Paragraph2 may mean ____________.

A. not all children are talented because of IQ

B. most children think twice before taking action

C. most children end their fresh ideas with actions

D. most children don't translate their ideas into action

3. What does the forth paragraph aim to tell us?

A. To prove Arjun's idea is marketable.

B. To praise Arjun's talent in invention.

C. To complain his employees are not creative.

D. To explain what is the "aha" moment.

4. Why will Khubani's company carry out market research on "Green Paws"?

A. They plan to give Arjun and his classmates more prizes

B. They hope to produce more "Paws" to make profits

C. They hope to ensure the fairness of the competition

D. They plan to find the carbon footprint of "Green Paws"

题型:选择题

以下属于功能易用性测试关注范畴的是______。

A.软件提供的功能是否丰富
B.当执行耗时较长的任务时,软件是否能定时向用户提示当前任务完成的进度
C.软件是否能够在多种操作系统环境下运行
D.软件是否能在不同的硬件配置下运行

题型:选择题

慢性闭角型青光眼形态学诊断应选择()

A.B超

B.光学相干断层扫描

C.A超

D.超声生物显微镜

E.彩色多普勒成像

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