【单选题】
人体内维生素D的生理活性形式为?
①
25-(OH)-D3
②
24，25-(OH)2-D3
③
25-(OH)-D2
④
1，25-(OH)2-D3 1，25-(OH)2-D2
【单选题】
Well, it’s getting late. I must be going. Thank you again for inviting me to the party.
①
Oh, it’s so late
②
Thank you for coming
③
Oh, so soon?
④
I really had a happy time
【单选题】
---MarryChristmas!---___________.
①
Oh,thankstoyou!
②
HappyNewYear!
③
Thesametoyou!
④
Inevercelebrateit!
【单选题】
-Hi, haven’t seen you for ages! You look fine! -____. You look well, too.
①
Great
②
Thanks
③
Oh, no
④
Not at all
【单选题】
—HowwasyourtriptoLondon,Jane?—_______<br/>
①
Oh，wonderfulindeed.
②
Iwenttherealone.
③
Theguideshowedmetheway
④
byplaneａndbybus.