题目信息
Statisticians studying the health effects of uranium mining on Navajo communities have found others besides miners and millworkers to be affected; birth defects, children's cancer, and altered birth ratios of males and females are much higher in mining than in non-mining communities.
A:children's cancer, and altered birth ratios of males and females are much higher
B:cancer among children, and altered male and female ratios at birth are much higher
C:cancer among children, and altered birth ratios of males and females occur much more frequently
D:altered birth ratios of males and females, and children's cancer are much higher
E:altered male and female ratios at birth, and cancer among children occur much more
参考答案及共享解析
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已选答案：
正确答案：
C:cancer among children, and altered birth ratios of males and females occur much more frequently
答案C
原句大意：研究铀开采对纳瓦霍人社区的健康影响的统计人员发现，除了矿工和制粉工人之外，其他人也受到了影响。 与非采矿社区相比，采矿区的先天缺陷，儿童癌症以及男女出生比例的改变要高得多。
A.错误， altered birth ratios . . . are much higher 表述不清楚
B.错误， altered birth ratios . . . are much higher 表述不清楚
C.正确
D.错误，表述不清楚，不清楚birth ratios of males and females和children's cancer哪个是higher
E.错误，at birth表明性别在出生的一刻被决定，但这是不符合逻辑的。
原句大意：研究铀开采对纳瓦霍人社区的健康影响的统计人员发现，除了矿工和制粉工人之外，其他人也受到了影响。 与非采矿社区相比，采矿区的先天缺陷，儿童癌症以及男女出生比例的改变要高得多。
A.错误， altered birth ratios . . . are much higher 表述不清楚
B.错误， altered birth ratios . . . are much higher 表述不清楚
C.正确
D.错误，表述不清楚，不清楚birth ratios of males and females和children's cancer哪个是higher
E.错误，at birth表明性别在出生的一刻被决定，但这是不符合逻辑的。
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