As science developed rapidly in the direction of technology, it supplies man a better and more comfortable 1. Men will be working shorter and shorter hours,2 and housewives will also be able to have more free time. Can you 3 doing housework without a housewife? Scientists believe this will 4 into realities in not very long time, and perhaps during your lifetime house-robots will take 5 of housewives.

    When I 6 this kind of machine with housewives, some 90 percent of them replied 7 “How soon can I buy one?” The other 10 percent said, “I would be terrified to see it8 about my house.” But when I explained to them that it could be turned 9 or stopped, they quickly realized that it was a 10 object.

    In my own 11 we have found that the washing-up machine is regarded as a good12in the room. There's no greater13than to go to bed in the evening and 14 that the washing-up is being done downstairs after we are 15.

    Some families would 16 to have their robot slaves 17 all the downstairs housework after they were in 18 at night, while others would have it19 in the mornings. But this would be entirely a matter of20.

小明利用如图所示的实验装置探究“导体产生的热量与电阻大小的关系”，甲、乙两瓶中装有质量与初温相同的煤油，甲瓶中铜丝的电阻比乙瓶中镍铬合金丝的小．