问题
选择题
卵细胞形成过程中,卵原细胞、初级卵母细胞、次级卵母细胞、卵细胞的个数比是[ ]
A.1:1:2:4
B.1:1:1:2
C.1:1:4:4
D.1:1:1:1
答案
答案:D
卵细胞形成过程中,卵原细胞、初级卵母细胞、次级卵母细胞、卵细胞的个数比是[ ]
A.1:1:2:4
B.1:1:1:2
C.1:1:4:4
D.1:1:1:1
答案:D
Passage Three
What seems to be a reasonable explanation for the findings according to the passage
A.Students in Cambridge tend to be heavy smokers.
B.Students in Cambridge are poor.
C.Students in Cambridge smoke a lot.
D.Smoking can help people to concentrate.