問題詳情

第四大題： 篇章結構 (請依文意，在文章後所提供的選項中分別選出最適當者，使篇章結構清晰有條理，每題2分，共10分)第39至43題為題組There are two types of twins, fraternal twins and identical twins. Fraternal twins result when the mother’s ovaries release two ova at the same time, __(39)__. Although the resulting babies grow together in the womb during the nine months of pregnancy and are born at the same time, __(40)__. Like ordinary brothers and sisters, fraternal twins may or may not closely resemble each other. They may be of different sexes and have different facial features, different eye and hair coloring, and different physiques.In contrast, identical twins result when a single fertilized ovum separates into two identical embryos during the first 14 days after fertilization. During pregnancy, the embryos develop into two identical babies. The babies are genetically identical __(41)__. Identical twins look like Xerox copies of each other. Often, especially in their early months, they are indistinguishable, even to their parents. Many parents of identical twins admit that they aren’t completely certain which twin is which, __(42)__. For example, they might paint the toenails of one twin, or always dress one twin a certain color and dress the other twin in another color. As the babies grow older, __(43)__. For instance, one twin might have a distinctive feature, such as a freckle, that the other twin lacks.
(A) because they inherited the same genes from the union of their mother’s single egg and their father’s single sperm.
(B) genetically they are no more alike than ordinary siblings born from separatepregnancies
(C) so they may deal with the problem by using an identification system to tell themapart
(D) slight differences that help distinguish one twin from the other might becomeapparent
(E) and these are fertilized by two separate sperm from the father
39

參考答案

答案：E
難度：非常困難0
統計：A(0),B(1),C(0),D(1),E(0)

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