问题 单项选择题

口腔主要的生态系不包括()

A.颊上皮生态系

B.舌背部生态系

C.龈上牙菌斑生态系

D.龈下牙菌斑生态系

E.腭上皮生态系

答案

参考答案:E

单项选择题 案例分析题

患者男,38岁,离异,软件工程师,因“发热、咳嗽、咳痰15d,加重伴呼吸困难7d”来诊。7d前于当地医院诊断为“肺炎”,给予青霉素及头孢菌素抗炎治疗无效,3d前患者出现畏寒、寒战,呼吸困难进一步加重,给予“万古霉素、氟康唑、左氧氟沙星”治疗,咳嗽稍缓解,但仍发热、气促。自患病以来体重下降约10kg。1年前患“左侧胸部带状疱疹”,复发3次。查体:T38.6℃,P100次/min,R26次/min,BP125/87mmHg;意识清楚,精神差;可见甲癣;双肺叩浊音,呼吸音稍低,双下肺可闻及细湿性啰音,未闻及干鸣音;心、腹均无明显异常;双下肢无明显水肿。血常规:Hb123g/L,WBC5.70×109/L,N0.80,L0.15,PLT109×109/L。ECG:未见异常。胸部X线片:双下肺斑片影。胸部CT:双肺弥漫性磨玻璃状高密度影,考虑间质性肺炎。肺功能:限制性通气功能障碍。

欲进一步明确病原体,应优先进行的检查是()(提示:HIV-1抗体2次初筛阳性,血清送至省疾病控制中心行HIV确证试验阳性,确诊为“艾滋病”。血PPD抗体、弓形虫抗体、风疹病毒抗体、巨细胞病毒抗体、单纯庖疹病毒抗体、肺炎支原体抗体、肺炎衣原体IgG及IgM均阴性。反复多次痰涂片未见抗酸杆菌,多次痰培养无细菌及真菌生长。)

A.经皮肺穿刺活检

B.支气管肺泡灌洗

C.开胸肺活检

D.胸部CT

E.血培养

F.咽拭子培养

阅读理解

阅读理解

     Ants have an amazing ability to communicate with each other and work together to accomplish(完成)

difficult tasks.Their specialized behavior due to chemical communication is so well developed, in fact, that

humans can learn a lot from them about how to work best in teams.

      British scientists at the University of Bristol are studying colonies(群体)of army ants to understand

how they organize themselves and share knowledge.These insects-which come in various sizes-are known for using their bodies as living plugs to cover holes on the uneven ground between their nest and their prey.When they meet a hole in their path, they can quickly determine which of them is the best fit.The

appropriate ant then lies across the gap, allowing the remainder of the group-as many as 200,000 other

ants-to step on its back.This important minority of ants makes the food collection of the entire colony in

the best possible way by "paving the way" for the others.

     The collective behavior that emerges from a group of social insects, such as ants, can be called

"swarm intelligence". Swarm intelligence consists of the selforganization of many individuals that work

collectively to find the best solution to a difficult problem.The concepts of swarm intelligence have been

used in a variety of human applications.It has been used as a method that improves the efficiency of

goods transfers on airplanes, and has even become a routing technique for moving data across

telecommunications networks more smoothly.You could say that our daily lives benefit from the tireless

work of ants.

1. What can we learn from ants according to the text?

A. How to help others to achieve great goals.

B. Good communication skills are important.

C. How to achieve the best result by working as a team.

D. The hardworking spirit in teamwork.

2. A study made by British scientists suggests that________.

A. ants are a group of clever insects

B. army ants' behavior is difficult to understand

C. ants enjoy using their bodies as living plugs

D. ants' collective behavior ensures their food supply

3. What can we learn about "swarm intelligence"?

A. It is a kind of collective behavior in social insects.

B. It refers to the selforganization of many insects.

C. The concepts of it will be used by many animals.

D. It is the best method of processing data.

4. The study of ants' behavior can be applied in ________.

A. road transportation and education

B. aerial transport and telecommunications

C. team organization and engineering

D. computer and information technology