脊柱关节病的关节受累以骶髂关节及下肢不对称性关节炎为特点。()
参考答案:对
News came from the school office Wang Lin had won the first prize in the national competition.
A.which
B.what
C.that
D.where
绿素a和叶绿素b及在某个波长范围内(红光)有尖锐的吸收峰,可以借助这一特性来鉴定它们,这个波长范围是()
A.450~550
B.500~600
C.550~650
D.600~700