材料一：观察下列春秋战国时期的两幅图

材料二：卫鞅曰：“治世不一道，便国不法古。故汤武不循古而王，夏殷不易礼而亡。反古者不可非，而循礼者不足多”。孝公曰：“善。”以卫鞅为左庶长，卒定变法之令。

──司马迁《史记•商君列传》

材料三：秦王扫六合，虎视何雄哉！挥剑决浮云，诸侯尽西来。

──李白

请回答：

    A meteorite（陨石）almost____(hit) an 80-year-old man named Arthur Pettifer in the UK while he____(work) on the farm. The meteorite was____(big) in the past 26 years in the UK. It weighed（重）one kilo, and might be over 4,000,000,000years old.

    "I heard the big noise in the air. I looked up and saw something falling from the sky to the ground（地面）____ (heavy)," he said, "I had a bad____(feel) about it at that time.____ first I thought it was a plane."

    Meteorites are small things from the space.____ about 3,500 meteorites may fall on the earth every year, only very few of these____(fall) rocks are found. Mr. Pettifer's meteorite is the fifth to fall in the UK____the year of 1939.

    Mr. Pettifer is glad. "When you think about it coming from so far away.____ really is something strange."

在一对相对性状的杂交实验中，子一代（F₁）未表现出来的亲本性状称为（    ）