精品解析：广东省华南师范大学附属中学2021届高三5月综合测试（三模）英语试题

华南师范大学附属中学2021届高三综合测试 英语 注意事项： 1．答卷前，请务必用黑色字迹的钢笔或签字笔将自己的班级、姓名和考号填写在答题卡和答卷上。 2．选择题在选出答案后，用2B铅笔把答题卡上对应题目选项的答案涂黑，如需改动，用橡皮擦干净后，再选涂其他答案，答案不能答在试卷上。 3．非选择题必须用黑色字迹钢笔或签字笔作答，答案必须写在答卷各题目指定区域内相应位置上；如需改动，先划掉原来的答案，再写上新答案；不准使用铅笔和涂改液。不按要求作答的答案无效。 4．考生必须保持答题卡的整洁。考试结束后，将答卷和答题卡一并交回。 第一部分 阅读（共两节, 满分50分） 第一节（共15小题；每小题2.5分，满分37.5分） 阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项。 A There are as many different types of sleeper as there are animal varieties on the planet. There are dozers, dreamers, nappers and hardcore dead-to-the-worlders. Dolphins Dolphins face a bit of a problem as they spend their whole lives in the water, but as mammals they need to breathe oxygen to survive. How do they juggle this when unconscious? Dolphins shut down half of their brain, which rests, while the other half is alert and looking out for any potential dangers. As they do this, the dolphin will lie on the surface of the water in a behaviour known as “logging”. Elephants Elephants tend to nod off for a few minutes at a time throughout the day. Elephants only manage about two hours of sleep per day, and that’s not even a concentrated block of shuteye. They tend to nod off for a few minutes at a time throughout the day. Possibly because of this, most of their sleeping is done standing up, with just the occasional recumbent sleep. Spiders Of course spiders have to be awkward. Even though animals sleep in a vast array of different ways, all of them, even bacteria, follow a 24 hour cycle, known as a circadian rhythm that is dictated by the rotation of the Earth. But scientists have discovered that certain types of orb-weaving spiders simply don’t bother with this. Their body clocks follow a 17, 18 or 19 hour cycle. Scientists aren’t exactly sure how the spider can even exist with this completely different body clock. Koalas One problem with trying to work out a creature’s sleeping habits is the difficulty of identifying what is actual sleep. It’s easier to study captive animals, but they can behave in a completely diffe