单项选择题

Questions 11-13 are based on the following passage. You now have 15 seconds to read questions 11-13.
According to the author, which of the following is NOT an achievement of the 20th century science

A．Nuclear power.
B．Strong computers.
C．Nuclear weapons.
D．Conquering cancer.

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What have people who listened to the radio regularly ever experienced

Questions 11-13 are based on the following passage. You now have 15 seconds to read questions 11-13. According to the author, which of the following is NOT an achievement of the 20th century science 您的浏览器不支持 audio 元素。