秦王初并天下，令丞相、御史曰：六王咸伏其辜，天下大定。今名号不更，无以称成功，传后世。其议帝号。”丞相绾、御史大夫劫、廷尉斯等皆曰：“臣等谨与博士议曰：‘古有天皇，有地皇，有泰皇，泰皇最贵。’臣等昧死上尊号，王为‘泰皇’。”王曰：“去‘泰’，著‘皇’，采上古‘帝’位号，号曰‘皇帝’。”

    维秦王兼有天下，立名为皇帝，乃抚东土，至于琅邪。齐人徐市等上书，言海中有三神山，名曰蓬莱、方丈、瀛洲，仙人居之。请得斋戒，与童男女求之。于是遣徐市发童男女数千人，入海求仙人。始皇为微行咸阳，与武士四人俱，夜出逢盗兰池，见窘，武士击杀盗，关中大索二十日。

    始皇以为咸阳人多，先王之宫廷小，乃营作朝宫渭南上林苑中。先作前殿阿房东西五百步南北五十丈上可以坐万人下可以建五丈旗周驰为阁道自殿下直抵南山表南山之颠以为阙。为复道，自阿房渡渭，属之咸阳，以象天极阁道绝汉抵营室也。阿房宫未成；成，欲更择令名名之。作宫阿房，故天下谓之阿房宫。隐宫^①徒刑者七十余万人，乃分作阿房宫，或作骊山。发北山石椁，乃写蜀、荆地材皆至。关中计宫三百，关外四百余。

    有坠星下东郡，至地为石，黔首或刻其石曰“始皇帝死而地分”。始皇闻之，遣御史逐问，莫服，尽取石旁居人诛之，因燔销其石。

    始皇出游。至平原津而病。始皇恶言死，群臣莫敢言死事。七月丙寅，始皇崩于沙丘平台。九月，葬始皇骊山。始皇初即位，穿治骊山，及并天下，天下徒送诣七十余万人，穿三泉，下铜而致椁，宫观百官奇器珍怪徙臧满之。令匠作机弩矢，有所穿近者辄射之。以水银为百川江河大海，机相灌输，上具天文，下具地理。以人鱼膏为烛，度不灭者久之。或言工匠为机，臧皆知之，臧重即泄。大事毕，已臧，闭中羡，下外羡门，尽闭工匠臧者，无复出者。

（节选自《史记·秦始皇本纪》）

【注】①隐宫是古代的一种酷刑。

某同学在探究“绿叶在光下制造有机物”时，设计实验步骤如下：①将盆栽的天竺葵放到黑暗处一昼夜 ②用不透光纸片将叶片的A处从上下两面遮盖，B处暴露在阳光下（如图一）③光照几小时后摘下叶片 ④将叶片水浴加热，叶绿素溶解后取出漂洗 ⑤向叶片滴加碘液 ⑥冲洗碘液观察现象

请回答下列问题．

根据短文理解，选择正确答案。

    Some unwelcome visitors from North America have been turning up in the waters off the coast of Great Britain.

    North American lobsters (龙虾) have been found in the North Sea (between Great Britain and Northwest Europe), far from their own habitat. The lobsters usually live along the eastern coast of Canada and the United States.

    It is impossible that the lobsters could have made the 5,600-kilometre journey on their own. They were probably brought to Britain and then got away from containers. Some of the lobsters that were caught had elastic bands (松紧带) holding their legs shut, like lobsters that are kept in containers in stores or restaurants.

    Many may have been “set free” from some ships passing through the area. Sometimes passengers order a live lobster from a tank in the dining room and then ask the waiter to throw it overboard instead of cooking it.

    According to official records, 26 North American lobsters have been caught in waters off Great Britain since 1988. However, it is believed many more have been found but not reported.

    It is against the law to let North American lobsters come into British waters. If they settle down in European waters, it would be bad for the local lobsters. The two live in the same place and eat the same food. But North American lobsters are larger, stronger and more aggressive (好斗的) than European lobsters, and they produce young more quickly.

    As a result, they could take food and space away from the local lobsters, and from other types of shellfish that live in the same area. These lobsters may also carry diseases that could harm the local lobsters.

下列说法正确的是（    ）。