根据句意及首字母补全在本课中出现的单词。

   1.Students like to wear j_______ this year.

    2.We don't go to school on w_______.

    3.The ball is r_____.

    4.This sweater is made of c______.

    5.The girl always keeps her room t______ and clean.

    6.There are twelve months in a y_________.

冠心病心绞痛患者至少有一个冠状动脉的主支管腔显著狭窄达横截面积的（）

A.30%以上

B.50%以上

C.75%以上

D.90%以上

E.95%以上