甲，乙，丙三辆汽车以相同的速度经过同一路标，从此时开始，甲车做匀速直线运动，乙车先加速后减速，丙车先减速后加速，三车经过下一路标时速度相同，则（    ）

下列各句中，没有语病的一句是（   ）

   When Bill is very young, he loves picture. His mother often draws some for him on old pieces of paper. She is very bad at drawing, but bill likes her pictures and always wants more. Then, when he is a little older, Bill’s mother gives him some pencils and a drawing book, and he begins drawing pictures, too. But they are never good .When Bill is five years old, his mother gives him a small blackboard and some pieces of a baby on the blackboard, he draws lines(线条) and rubs(擦) them out too for ten minutes , but when he looks at his picture , he is not happy. “Well”, he says at last(最后) to his mother, “I’ll put a tail(尾巴) on it and make it a monkey.”

如图，在△ABC与△ADE中，$\frac{AB}{BC}=\frac{AE}{ED}$，要使△ABC与△ADE相似，还需要添加一个条件，这个条件可以是____ 。

如图所示探究热机的基本工作原理：在试管中装些水，用软木塞塞住，加热使水沸腾，水蒸气便会把软木塞冲出．在这个实验中，酒精燃烧放出的热量，通过 ____将一部分能量转移给水，燃料的化学能转化为 ____能；水沸腾产生大量的水蒸气，水蒸气膨胀对软木塞 ____，把塞子冲出去，水蒸气的 ____能转化为塞子的 ____能．