C. The Japan’s nuclear accident will not affect the birth gender of the US because of the long distance.
D. Where radioactive material has spread, women can’t give birth to girls.
3. How does radiation affect birth gender?
A. It damages the Y chromosome in sperm.
B. It stops the X chromosome from being produced.
C. It kills baby girls before they are born.
D. It damages the X chromosome in sperm.
4. What does the passage mainly tell us? A. Nuclear radiation leads to millions of fewer baby girls being born.
B. Nuclear radiation has bad effects upon people’s health.
C. Worries about radiation risks.
D. Nuclear age helps reduce the world population.
答案:
根据一项新研究,核辐射会对精子的X染色体造成损害,核电站核泄漏事故和炸弹试验释放的放射性物质导致全世界女婴出生数量减少了数百万。
1. B 细节理解题。文章提到了“the 1986 Chernobyl disaster”和“Japans Fukushima Daiichi nuclear power plant accident”两起核辐射事故,故选B。
2. B 正误判断题。由第四段可知B项正确。由第二段可知大气中发生的事故才会在全球范围内影响出生婴儿的性别,故A项错误;由倒数第三段可知日本核电站发生的事故会影响到美国,故C项错误;核辐射只会相对地减少女婴的出生数量,故D项错误。
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