睡眠呼吸暂停综合征的易患因素包括()
A.甲状腺功能减低
B.肥胖
C.肢端肥大
D.慢性鼻炎
E.面部畸形
参考答案:A, B, C, D, E
Seeing the happy ________ of children playing in the park,I'm full of joy and confidence in
the future of our country.[ ]
A.sight
B.scene
C.view
D.sign
地球是人类的家园.地壳里各种元素的含量差别很大,按质量计,含量最多的元素是( )
A.铝
B.硅
C.氧
D.铁