接触网导线最大弛度时距轨面的最高高度为6700mm。（）
参考答案：错
People were perhaps more honest a long time ago when life was very different from _________ it is today.
A．which
B．that
C．what
D．how
红细胞Daffy血型系中Duffy抗原位点位于第几号染色体上
A．1号染色体
B．6号染色体
C．9号染色体
D．21号染色体
