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【简答题】
Snow Leopard Snow leopards are big cats. They are endangered animals. This means they are in danger of dying out. They live in the mountains of central Asia. Their mountain homes are very cold. Some of the countries where they live are Mongolia, China, and India. Snow leopards are not often seen by people. That makes it hard to know exactly how many of them are left. About 600 of them live in zoos around the world. It is thought that there are less than 6,000 of them still living in the wild, but there may be only half that many. Adult snow leopards weigh between 60 and 120 pounds. They are about two feet tall at the shoulder. From head to tail, they are from six to seven and a half feet long. They have long tails that help them balance. When resting, they wrap their tails around their bodies like a scarf to keep warm in the freezing temperatures. A snow leopard's beautiful spotted fur is thick and warm. Fur on the belly may be five inches long. Snow leopards have large, furry paws. The fur on their paws keeps their feet warm. It also helps them walk better on snow and ice. Their thick fur helps them live in the harsh, cold environment of the high mountains. Snow leopards are carnivores and predators. They kill and eat other animals for food. They often hunt at dawn and dusk. They eat ibex, a kind of wild goat. They eat smaller animals like birds, hares, and pikas. A pika is a small animal related to a rabbit. These leopards are members of the cat family, like lions, but they do not roar. They growl, meow, hiss, and mew. Males are bigger than females. Most snow leopards live alone. Mother leopards give birth to one, two, or three babies in a litter. Mothers and their cubs live together until the cubs are from eighteen months or about two years old. Then each goes his own solitary way in the wild. Snow leopards are called "ghosts of the mountains." Even people living in these remote mountains almost never see the beautiful but mysterious big cats.
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【单选题】生物体的生命活动离不开水。下列关于水的叙述,正确的是 ( )
A.
冬季来临时,植物体内自由水与结合水的比例增大导致抗寒性增强
B.
用H 2 18 O浇灌植物,不能在植物体内的(CH 2 O)中检测到 18 O
C.
有氧呼吸时,生成物H 2 O中的氢全部来自线粒体中丙酮酸的分解
D.
细胞在合成ATP以及遗传信息的传递和表达过程中,均有水的产生
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A.
往来款项明细账
B.
收入明细账
C.
支出明细账
D.
成本明细账
【多选题】下列关于真核细胞叙述正确的是:
A.
以脂质及蛋白质成分为基础的生物膜结构系统
B.
以核酸与蛋白质为主要成分的遗传信息表达系统
C.
由特异蛋白分子装配构成的细胞骨架系统
D.
由肽聚糖和胞壁酸构成的细胞壁
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A.
85°~ 95°
B.
80°~ 95°
C.
80°~ 90°
D.
85°~ 90°
【单选题】出现高致病性猪蓝耳病疫情后,可用碱类制剂进行消毒,消毒用的氢氧化钠制剂大部分是含有( )氢氧化钠的粗制碱液。
A.
94%
B.
90%
C.
80%
D.
85%
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A.
视网膜中央动脉,属终末动脉,供给视网膜内5层
B.
视网膜中央动脉,属终末动脉,供给视网膜外5层。
C.
视网膜中央动脉,属终末动脉,供给视网膜全层。
D.
睫状血管,营养脉络膜及视网膜内5层。
E.
睫状血管,营养脉络膜及视网膜全层。
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A.
杆锥细胞层
B.
内颗粒层
C.
内丛状层
D.
色素上皮层
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A.
设置物流成本辅助账户
B.
分析确认物流成本内容
C.
归集物流成本
D.
汇总计算物流成本
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