问题
单项选择题
急性混合细胞白血病的两系细胞混合是指
A．T细胞和B细胞
B．淋巴系和髓系细胞
C．粒系和单核系细胞
D．粒系和红系细胞
E．粒系和巨核系细胞
答案
参考答案：B
解析：急性混合细胞白血病的定义指一组髓细胞系和淋巴细胞系共同累及的白血病。
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急性混合细胞白血病的两系细胞混合是指
A．T细胞和B细胞
B．淋巴系和髓系细胞
C．粒系和单核系细胞
D．粒系和红系细胞
E．粒系和巨核系细胞
参考答案：B
解析：急性混合细胞白血病的定义指一组髓细胞系和淋巴细胞系共同累及的白血病。
| 完形填空。 In the last 500 years, several million people have been killed by earthquakes. Among all the earthquakes, the 1976 Tangshan Earthquake is regarded as the 1 one in the twentieth century. On July 28, 1976, a terrible earthquake of 7.8 magnitude (级) 2 Tangshan City, Hebei Province. In just one second, the city with one million people was destroyed. The earthquake was __3 strong that even Beijing and Tianjin were seriously affected (受到影响). The shock was felt in 14 provinces and cities-one-third of the country. The earthquake took place 4 midnight. Most people could not take any actions.  Over 240,000 people 5 and about 170,000 were seriously injured. Water supplies, communications and traffic were completely cut off. The people there needed 6 immediately. But they could not wait for help 7 . They formed groups to dig for others. They set up medical areas and tents. They searched for food and clean water. Recovery(恢复)was not easy with so much 8 . Yet, after a lot of care was given in time, the rebuilding of Tangshan began almost 9 . Though it took time, the whole city was rebuilt and is 10 home for over a million people, earning (赢得)Tangshan the name "Brave City of China". | ||||
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