根据症状，应诊断为：A．针眼 B．土疳 C．胞生痰核 D．脾生痰核 E．椒疮

阅读理解。

     The World Expo 2010 Shanghai China is to be staged in Shanghai from May 1 to October 31, 2010. If you

plan to visit the Shanghai Expo this summer, the China Pavilion is a must-see area for you. 

     The China Pavilion, which is called Oriental Crown (东方之冠), is located at the center of the Expo site.

Standing 63 meters tall, the China Pavilion takes the shape of an emperor's crown, with the upper layers larger

than the lower ones. Covering 160,000 square meters in floor space, the pavilion consists of a national hall and

a regional hall. Construction on the China Pavilion began on Dec. 18, 2007. The design of the China Pavilion

was picked from a total of 344 designs put forward by Chinese from around the world. The pavilion possesses

both traditional and modern features, which helps develop the theme of the 2010 Expo "Better City, Better Life".

For example, it is red in appearance, which contains the elements of traditional Chinese culture, and it is green

indoors, with the use of energy-saving techniques. The Shanghai World Expo is expected to attract 70 million

visitors from across the globe. It is estimated that 400,000 people will visit the Expo and its 140 pavilions every

day during the period, but the China Pavilion is only able to receive about one tenth of the total. How to

accommodate so many people in the pavilion remains a tough task. Luckily, the China Pavilion is built as a

permanent landmark. 

     During the Expo, the main structure will be used for an exhibition based on the theme of "Chinese wisdom

in urban development" by explaining the values of harmony, nature and spirit. The three-story pavilion has three

sections. The top floor's "Footprint of the East" will show some of the changes in Chinese cities. There, you can

see a film which shows how Chinese cities have changed, especially in the past 30 years. According to Lu

Chuan, director of the film, the scenery is like something from The Lord of the Rings. On the second floor,

"Journey of Wisdom" will explain China's four great inventions. And the ground's "Blossoming City" will display

scenes from cities of the future.

1. Which of the following words can be used to describe the China Pavilion? [ ]

A. Tiny.

B. Round.

C. Foreign.

D. Environment-friendly.

2. The China Pavilion can receive _____ visitors at most per day. [ ]

A. 40,000

B. 400,000

C. 100,000

D. 20,000

3. We can infer that _____. [ ]

A. the China Pavilion will be pulled down after the World Expo 2010 is over

B. the China Pavilion will probably continue to be open to visitors after the Expo is over

C. you can continue to visit the Japanese Pavilion after the Expo is over

D. some foreign friends took part in the designs of the China Pavilion

4. On the second floor of the China Pavilion, you can _____. [ ]

A. enjoy a film about the changes of cities in China

B. learn what Shanghai looked like in the 1920s

C. find out how paper was invented

D. see how Chinese cities will look like in the future

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打开窗体后单击命令按钮，屏幕显示______。

2013年4月16日国家卫生和计划生育委员会公布，全国共报告人感染H7N9禽流感确诊病例77例，其中16人已死亡，禽流感再度备受关注。医学界正在致力于研究预防H7N9禽流感病毒的疫苗和单克隆抗体。由于来源于小鼠体的单克隆抗体，治疗效果不很理想。科学家决定采用基因敲除术将小鼠的Ig基因敲除，代之以人的Ig基因，然后用H7N9病毒去免疫小鼠，再经杂交瘤技术即可产生大量完全人源化抗体。下图是某科研机构的实验方案。请回答：

此处基因敲除技术的受体细胞不是小鼠的受精卵，而是小鼠的（）细胞，经技术处理后的该细胞，再重新植入小鼠脾脏中增殖。

东风4B型内燃机车制动活塞行程应为（）

A.50mm~90mm

B.74mm~123mm

C.132mm~176mm