“Sorry” is a word that people in Britain often say in their daily lives.

    One day while I was w____ in the street, a young man ran in a hurry, brushing(轻擦) against my handbag. He continued his way, but turned b____and said “sorry” to me. Even in a rush, he didn't f____to say “sorry”. One day, after I bought some bananas, the shopkeeper was passing m____the change(找回的零钱), but I wasn't ready for it and a coin dropped onto the ground.

    “S____, madam,” he said while bending(弯腰) to pick it up. I was s____why he said“sorry” to me. Another t____, I stepped(踩) on a man's foot at the entrance(入口处) to a cinema. At the same time, we b____said “sorry”. Slowly, I got to know that when something unpleasant happens in daily life, the British don't care much about who is wrong. If someone is in t____, a “sorry” is always necessary. Perhaps(也许) that is w____I seldom see people quarrel(吵架) on the buses or streets in Britain.

理论上每一个表皮细胞与神经细胞内所含DNA的质与量是一样的，为何所含蛋白质的质与量不一样（  ）

下列比例尺中，比例尺最小的是（    ）

已知点P（－1，3）在反比例函数$y=\frac{k}{x}\left(k\ne 0\right)$的图象上，则k的值是 (      )