导致老年妇女发生髋部脆性骨折的疾病不可能是（）
A.原发性甲状旁腺功能亢进症
B.肾小管性酸中毒
C.骨质硬化症
D.代谢综合征
E.泌乳素瘤
参考答案：C
公安机关的职责是公安机关依法在管辖范围内应承担的责任和义务。（ ）
填空。
1. we are _____ at Wang Lin's long yellow hair.
2. After the long walk, the children are very _____.
3. I like dolphins because they're very _____.
4. The boy is _____. He wants to be a basketball player when he
grows up (长大).
