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.

下列做法中属于正确对待挫折的是（    ）

已知空气的单位体积质量为1.29×10^﹣3克/厘米³，1.29×10^﹣3用小数表示为（　　）