Mr. Jones had a quarrel with Mrs. Jones the other day. So they were very angry with each other. For several days they did not s____to each other at all. One evening Mr. Jones was very t____ when he came back from work, so he went to bed at once after d____. Of course he did not say a____to Mrs. Jones before he went upstairs. Mrs. Jones washed the dishes and then did some sewing. When she went up to bed much l____ than her husband, she found a p____ of paper on the small table near her bed. On it were the words, 'Mother—Wake me up at 7 a.m.—Father.'

    When Mr. Jones w____ up the next m____, it was nearly 8 a. m. —and on the small table near his bed he saw a____ piece of paper. He took it and r____these words: 'Father—Wake up. It's 7 a.m. —Mother.'

中国作为最大市场，2014年机器人销量约为5.6万台，增幅高达54%，其中1.6万台由本土供应商提供，其余来自瑞士、德国、日本等外国制造商。“机器人换人”兴起的原因，合理的是（  ）

①人口红利消退，人工成本上涨    ②机器人全面取代人工是发展趋势

③机器人能带来更高经济效益    ④机器人能创造更高的商品价值

黄土高原地区的传统民居是____。