How serious are infectious diseases?
Consider what happened in 1918, the influenza pandemic (流行病,瘟疫). It started in the fall of 1918 with 1._____________ seemed to be something no more serious than the common cold. In the next two years, 2.____________, it infected a fifth of the world’s population.
In fact, it turned out to be the most deadly epidemic(流行病) in history, 3.____________(kill) between 20 and 40 million people.
The influenza virus 4.___________caused it was much stronger than previous influenza viruses. Its mortality rate was two and a half percent 5._________(compare) to a point one percent in previous influenza epidemics.
It 6.__________ (strike) quickly and without mercy, sometimes killing people within hours. Schools and businesses closed in many places, and people wore masks to prevent 7.____________ (transmit) of the virus through the air.
What was 8.____________ (usual) about this pandemic was that it was most 9.____________(dead) for people 10.___________ (age) 20 to 40, rather than the elderly and young children.
题目内容
（请给出正确答案）
参考答案
十点题库官方参考答案
（由十点题库聘请的专业题库老师提供的解答）
