1﹣2+3﹣4+5﹣6+…+2005﹣2006的结果是（ ）
A：0
B：100
C：-1003
D：1003
A
Lost:A pencil box
It is blue.My name is Jenny Brown.My phone number is 236-9878.
Found:A watch
Is this your watch?Please call Dave. Phone number :236-8567.
Tina,
A nice black bag is in the school library .Is it yours? Ask Miss Li for it.---Jack.
A nice green notebook is in Classroom 2B.A photo of a girl is in it.Is it yours?E-mail me at Gina23@163.com.
大脖子病 ____ A甲状腺激素
侏儒症 ____ B生长激素
糖尿病 ____ C胰岛素
