Mrs Brown is very fat (胖).

    “Don't eat meat or cakes,” her doctor says to her.

    “I'm going to stop her eating them, doctor,”her husband (丈夫) says.

    The next morning, Mrs Brown makes a nice cake, and her husband eats half of it. After he goes out, Mrs Brown cuts (切) a very small piece of the cake and eats it. It is very good. She cuts a bigger piece and eats it. In a few minutes she finishes the cake. “My husband is going to be very angry (生气).” She says. “What am I going to do?”

    She makes another cake very quickly, eats half of that, and leaves half on the table.

    Her husband comes back later. He sees the half of the cake on the table and he is very happy.

在一次自行车越野赛中，甲乙两名选手行驶的路程y（千米）随时间x（分）变化的图象（全程）如图，根据图象判定下列结论不正确的是（         ）