内容正文:
2023届新高考英语第二轮复习压轴大题逆袭卷 06
(阅读CD+七选五+完形填空+语法填空+小作文+读后续写)
原卷版
一、阅读理解
第一节 阅读下列短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。
C
体裁
话题
主题
建议时间
得分
说明文
人与自然
长期被认为是肉食者的鲸鲨也摄入绿色植物
7分钟
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【江苏省连云港市2022-2023学年高三上学期期中调研】As Mark Meekan, a tropical fish biologist at the Australian Institute of Marine Science in Perth, spotted a giant shadowy figure moving in the Indian Ocean, he was diving to take samples of a whale shark’s skin.
The sharks, averaging around 12 meters long, spend most of their lives in the deep ocean where they are hard to observe, so analyzing the chemical makeup of their tissues can help scientists learn more about their biology and behavior, including what they eat.
The skin samples that Meekan collected reveal that whale sharks, long thought to be strict meat eaters, also eat and digest algae (海藻). The findings add to evidence that whale sharks intentionally eat plants, potentially making them the largest omnivores on Earth.
Although algae has turned up in the stomachs of beached whale sharks before, “everyone thought it was just accidental ingestion (摄取),” Meekan says.
To find out if that assumption held up, Meekan’s team took tissue samples from 17 whale sharks feeding off the coast of Western Australia from 2015 to 2017. Whale sharks’ skin was rich in arachidonic acid (花生四烯酸) that is found in brown algae, the analysis showed.
The new work supports previous research by a different group that found algae-related nutrients in the skin of whale sharks near Japan. Together, the findings suggest that digesting greens is common practice for whale sharks.
But that doesn’t mean whale sharks are true omnivores, says shark biologist Robert Hueter. “This is a bit like saying that cows are omnivores because they eat insects while feeding on grass.”
Meekan admits that he isn’t sure whether whale sharks seek out algae, but the amount they eat isn’t incidental (附带的). “Their tissues hold a remarkable record of what they’ve been up to,” he says. “We’re now learning ho