①基因是有遗传效应的DNA片段②基因是DNA上有一定功能的特异碱基排列顺序③基因中4种核糖核苷酸序列代表特定的遗传信息④基因在染色体上呈线性排列⑤一个基因转录出的mRNA只能指导一条肽链的合成⑥基因中4种碱基排列顺序是随机的⑦基因的遗传效应的含义是能在蛋白质合成中决定一种氨基酸的位置．

右边漫画启示我们（     ）      

漳州市位于福建省东南部，地处东经117°~118°、北纬23.8°~25°之间，东濒台湾海峡，与厦门隔海相望，东北与泉州接壤，西北与龙岩相接，西南与广东的汕头毗邻。读资料，回答下题。

    While  Tom and Mary were on holiday at the seaside, they enjoyed 1seagulls(海鸥). They learned a lot about these2birds.
They will often come close to you on the beach when you are eating something. If you3a piece of bread to them, they will take it away quickly.
    Seagulls swim well, but they do not often dive(潜水)for fish. They are4good at flying with their wings(翅膀)。When a seagulls is flying, It puts its legs5its body. Tom often watched them6close to the ground because he like the way they7the air with their wings and put8their feet before they touched the ground. Mary liked to see them flying over the9smoothly(熟练的) and quietly without their wings moving, 10she said she didn't like the noise they made.