问题
单项选择题
下列维生素D中活性最强的是（）
A.维生素D2
B.维生素D3
C.25-（0H）D
D.1，25-（0H）2D
E.24，25-（0H）2D
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
下列维生素D中活性最强的是（）
A.维生素D2
B.维生素D3
C.25-（0H）D
D.1，25-（0H）2D
E.24，25-（0H）2D
参考答案：D
| 请用下面方框内所给词的适当形式完成下列句子，每项只能用一次。 | |
2. Thank you for _____ me to your party. 3. Wang Lihong is a _____ singer, he created many wonderful songs. 4. She just finished _____ the article. 5. Midori was a famouse _____. She played the violin quite well. |