坚持 * * 党的领导是我国政治制度的最高原则。( )
参考答案：对
Only about (31) ____________of people over 65 become senile.A much more common problem is in fact caused by: (32) ____________.(33) ____________.Nearly (34) ____________of people over 65 has at least one serious illness. Maybe about 15% of older people suffer from (35) ____________.When people become old, there are changes in metabolism, lungs, the senses, (36) ____________and (37) ____________.
肘关节提携角为（）。
A.20°～25°
B.16°～20°
C.10°～15°
D.5°～10°
E.1°～5°
