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医学
A、Two. B、Once. C、One and half. D、Randomly. B题目问的是每86个出生的人中有多少双胞胎。由定位句可知,每86个出生的小孩中就有一对双胞胎。故选B。
A、Two. B、Once. C、One and half. D、Randomly. B题目问的是每86个出生的人中有多少双胞胎。由定位句可知,每86个出生的小孩中就有一对双胞胎。故选B。
admin
2022-05-22
30
问题
Although twins have always been a source of curiosity, they are not so uncommon statistically, since they occur once in every 86 births. About one-third of all twins are identical, or single-egg twins. Identical twins have the same genes and, hence, the same sex, hair, eyes, blood type, and bone and tooth structure. Some identical twins are mirror images of each other. For example, one may be left-handed, the other right-handed. As young children, some identical twins may develop their own private language. Identical twins have a special intuition, and they often seem to think and dress alike even though they are away from each other. In fact, even when they are separated at birth and raised apart, identical twins develop startling similarities. They may pursue the same careers, have the same interests, or die within days of each other.
Q22: How many twins occur every 86 births?
Q23: About what proportion of twins are identical?
Q24: When they are young, what do some identical twins develop?
选项
A、Two.
B、Once.
C、One and half.
D、Randomly.
答案
B
解析
题目问的是每86个出生的人中有多少双胞胎。由定位句可知,每86个出生的小孩中就有一对双胞胎。故选B。
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