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