人体中元素的含量多少影响人体健康．下列元素中直接影响甲状腺激素合成的是[ ]
A．钙
B．铁
C．锌
D．碘
答案：D
根据句意及首字母或汉语提示完成单词。
1. I don't like summer, because it's too h_____.
2. There are lots of beautiful b_____ in Hainan Island.
3. —How is the w_____ today?—It's cloudy.
4. _____ (冬天) comes, can spring be far behind?
5. We are _____ (惊奇的) to meet an old friend on the street.
∠α=80°，则α的补角为（ ）．
