简述杜氏利什曼原虫的形态、生活史及防治原则。

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问题:

简述杜氏利什曼原虫的形态、生活史及防治原则。

考点:生物学原生动物原生动物题库
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北京时间2010年10月25日22时52分,印度尼西亚苏门答腊岛西部海域发生了里氏7.2级地震,主要原因是[ ]

A.印度尼西亚是个群岛国家

B.印度尼西亚地形以山地为主

C.印度尼西亚位于板块内部

D.印度尼西亚位于板块交界处

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抗精神病药降低L-dopa疗效是由于

A.进入脑内,合成NA,恢复中枢神经功能
B.兴奋延髓的催吐化学感受器触发D2受体
C.作用于大脑边缘叶
D.黑质-纹状体变性及其中DA浓度过高
E.阻断中枢多巴胺受体

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阅读理解。

     "All work and no play makes Jack a dull boy" is a popular saying in the United States. Other countries have similar sayings. It is true that all of us need recreation. We cannot work all the time if we are going to keep good health and enjoy life.

     Everyone has his own way of relaxing. Perhaps the most popular way is to take part in sports. there

are team sports, such as baseball, basketball, and football. There are individual sports, also, such as golf

and swimming. In addition hiking, fishing, skiing, and mountain climbing have a great attraction for people who like to be outdoors.

     Not everyone who enjoys sports events likes to take part in them. Many people prefer to be onlookers, either watching them on television, or listening to them on the radio. When there is an important baseball game or boxing match it is almost impossible to get tickets; everyone wants to attend.

     Chess, card-playing, and dancing are forms of indoor recreation enjoyed by many people. It doesn't

matter whether we play a fast game of ping-pong, concentrate over the bridge table, or go walking through the woods on a brisk autumn afternoon. It is important for every one to relax from time to time and enjoy

some form of recreation.

1. The underlined word "recreation"(paragraph 1)here means_______.

A. walking and climbing B. form of play or amusement  

C. creating somethingD. joy and happiness

2. according to the passage, perhaps the followings are our ordinary ways of relaxation for

    common people except______.

A. listening to music              

B. playing card

C. going out for fishing        

D. boxing match

3. Which of the following statements is TRUE to the passage?

A. The popular British saying mentioned in the passage has familiar doing in other countries.

B. All of us need recreation in our lives if we cannot work all the time.

C. Sometimes those who enjoy sports events like to take part in them, too.

D. It is almost impossible for everyone who wants to watch an important baseball to get a ticket.

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泵运转过程中,因泵入口压力过低导致泵运转过程中排量和扬程降低的处理方法是()

A、更换密封环

B、打开出口阀使其达到操作点

C、提高入口压力,正压进泵

D、立即停泵

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游艺娱乐场所设备核查要点包括场所使用的游戏游艺设备是否通过()文化主管部门内容核查,与文化部公布的内容是否相符。

A.县级

B.市级

C.省级

D.部级

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