中胚层分化形成的器官是（）。
A、心脏
B、脊髓
C、甲状腺
D、肾脏
E、头发
参考答案：A, D
误食含下列物质的食品不会引起中毒的是 [ ]
A.
B.
C.
D.
________ follow the buffalo, the Indians often had to move their camps.[ ]
A. In order to
B. So as to
C. In order that
D. So that
