诺贝尔化学奖的成果之一是对CO催化氧化过程的研究，即一氧化碳在铂催化剂作用下的氧化反应，这一过程可以表示为：COCO_ad    ， O₂2O_ad  ，CO_ad + O_ad→CO₂（式中标有ad的物质表示吸附在金属铂表面的原子或分子），下列说法错误的是（）

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     The umbrella is a very common object. It keeps the  1  and the sun off the people. Most umbrellas can be folded up(折叠) so it is  2 to carry them.

     However, the umbrella has not always been as 3   as it is now. In the past, it was a symbol of importance. Some African countries still use umbrellas in this   4  . Someone carries an umbrella and walks behind the king or important person.

     Umbrellas are very old. People in different parts of the world began to   5   umbrellas at different times. The Chinese had them more than 3,000 years ago. From there , umbrellas   6   to India and Egypt. In Greece and Rome,   7 wouldn't use them. They believed umbrellas were only for women.

     England was 8  the first country in Europe where common people used umbrellas against rain. The weather there is very  9   and umbrellas are very useful.

     Everybody uses umbrellas today. The next time you  10  one, thinking that for centuries only great men and women used them, you'll feel you are important people, too.

①有丝分裂中期细胞                ②有丝分裂后期细胞

③减数第一次分裂中期细胞          ④减数第二次分裂中期细胞

⑤减数第一次分裂后期细胞          ⑥减数第二次分裂后期细胞．