题目

Mr. and Mrs. Jones don’t often go out     36   , but last Saturday, Mrs. Jones    37___ to her husband, “There is a good    38    tonight. Can we go and see it?” Mr. Jones was quite    39    about it, so they went and both of them liked the film very much. They came out of     40    at 11 o’clock, got into their   41    and began to drive home. It was quite dark, then Mrs. Jones said to Mr. Jones, “Look! A woman is running along the road very    42    , and a man is running after her. Can you see them?” Mr. Jones said, “Yes, I can.正常情况下，人类卵细胞中含有的常染色体和性染色体的种类是 A.44+XX　　　　 B.44+XY C.22+X　　　　 D.22+X或22+Y