对于甲状旁腺素，下述哪项是正确的（）
A.是一种碘化酪胺酸
B.是不饱和脂肪酸
C.是一种糖蛋白
D.是一种甾体激素
E.是肽类激素C
参考答案：E
根据句意及图片的提示，补全单词。
1题 2题 3题 4题 5题
1. We have known that the hand-held ____was invented in 1971.
2. The____ sneakers that were invented by Julie Thompson are used for seeing in the dark.
3. I used three of flour and one of sugar.
4. The light ____ gives people more time to work and play every day.
5. In summer, many students really like wearing____ at home.
关于三屏智真的组网以下说法正确的有（）
A.智真的接入能力与终端一样，支持4E1和IP的线路接入
B.三屏智真可以看作3个终端的捆绑
C.如议中使用双声道或者三声道时接入数量不变
D.单屏智真组网与单个终端完全一
