短文填空

     One cold winter morning, an old woman had to s   1   for her doctor. When he came, she t   2   him that her right leg hurt, and that sometimes she could h   3   walk. She asked him what was w   4   , as she had n   5   had such feeling before.

     The doctor looked her over carefully, then he said, "You are in good h   6   for a woman of your age. I think the trouble in your right leg is just a matter of old age catching up with you. We get all kinds of illness(疾病) a_  7   we get older. The trouble will almost certainly e   8   in spring."

     "I don't think so, doctor!"she said. "y left leg is w   9   and it is the s   10   age as my right leg."

1. ______________ 2. ______________ 3. ______________ 4. ______________ 5. ______________

6. ______________ 7. ______________ 8. ______________ 9. ______________ 10. ______________

散发是指（）

A.较大地区内病例之间无明显联系的发病

B.发病呈历年一般水平

C.较大地区内年发病率未显著超过该地区前3年该病发病的平均水平

D.发病保持在历年一般水平的3～10倍之间

E.较小范围内的发病未超过其历年一般水平