茜草韧皮部薄壁细胞中含有的草酸钙针晶束与根的长轴平行。()
参考答案:对
When I was there, he was still working. He said that he (1) for the last two hours (2) that he was going to stop (3) . He added that if I had arrived ten minutes later, I (4) at home. When I mentioned that the house looked quite (5) , he said that the woman (6) usually cleaned it had been sick for some time and (7) for over a week. When I asked him (8) he did not do it himself, he said that he (9) to do so if Mrs. Jones did not come the (10) day.
[A] who [B] whom [C] which
变异指标是反映总体单位标志值差异程度的综合指标,表明总体各单位标志值的离散程度和离中趋势。()