理发店同时来了三位顾客，甲洗头需要10分钟，乙刮胡须需要5分钟，丙理发需要20分钟．要使三人等候的时间总和最少，理发师应按____ 顺序安排．

        One day, when Zhou Kai’s mother saw him ____ (head) towards the front door without a jacket on, she eyed him with____ (anxious). She asked him____ (put) on my jacket and he did ____ he was told.

         His mother always makes sure the family eat ____ . For example, they have fish four times a week. Zhou Kai very ____ (rare) gets colds but last week he had____  bad cold and a bit of a fever. How come? That’s____ he was stupid____  to play football in the rain. So you can see how crazy he is____  football.

    The Great Wall of China is more than 6,000 kilometres long. It winds ____ (it) way from west to east, across deserts, over mountains, through valleys____at last it reaches the sea. The Great Wall has a history of over twenty centuries. The first part of it ____(build) during the Spring and Autumn period. During the Qin Dynasty, ____(keep) the enemy out of his empire, Emperor Qin Shi Huang had all the walls ____(join) up. Thus, the Great Wall came into being. The Great Wall is wide enough at ____top for five horses or ten men to walk side by side. Along the wall are watchtowers, ____soldiers used to keep watch. Fires were lit on the towers as a ____ (warn) when the enemy came.

    It was ____(extreme)difficult to build such a wall in the ancient days without any modern machines. All the work was done ____hand. Thousands of men died and were buried under the wall they built. The Great Wall was made not only of stone and earth, but of the flesh and blood of millions of men.

在我们使用电器的时候，按一下遥控器的待机键，电器即进入等待开机的状态，即为待机模式．有的电器虽然没有待机按钮，可如果没有切断电源，也相当于处在待机状态．下表是常用家用电器在220V电压下的工作功率和待机功率．

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下列关于孟德尔遗传规律的得出的说法，不正确的是（　　）