结节病很少侵犯下列哪个器官()
A.心脏
B.皮肤
C.甲状腺
D.肝脾
E.双眼
参考答案:C
长方体有______个面,______条棱,______个顶点,相对的棱长度______,相对的面______.
---Do you go to swim every day?
---No, but I ________.
A.used to do
B.used
C.used to do it so
D.used to