搜索
Champion （冠军）of the cold | |
Arctic tern 北极燕鸥 | Size: About 35 cm long Food: Fish and shells （贝类） Skill: We spend summer in the Arctic. When it is winter in the Arctic, we fly to Antarctica （南极）. We hold the record for the longest migration （迁徙）of any animal in the world! |
Lemming 旅鼠 | Size: 15 cm long Food: Grass Skill: We grow hard “shells” on our claws （爪子）. We can dig holes easily in the hard and icy land. |
Polar bear 北极熊 | Size: 2. 5 to 3 m long Food: Seals and fish Skill: Our thick and waterproof fur （防水毛皮）coat keeps us warm and dry after swimming. Under our fur, we have black skin （皮肤）. This helps us take in the sun's heat. |
Arctic fox 北极狐 | Size: 45 to 100 cm from head to tail Food: Lemmings, fish and birds Skill: We can change the color of our fur. Usually, we are white in winter and brown in summer. |
Harp seal 格陵兰海豹 | Size: 1. 5 to 1. 8 m long Food: Fish Skill: Our thick fur and fat keep our body temperature at 40°C. We can stay warm! |
| A．Lemming. | B．Harp seal. | C．Arctic fox. | D．Arctic tem. |
| A．Brown. | B．Black. | C．White. | D．Yellow. |
| A．Two. | B．Three. | C．Four. | D．Five. |
| A．Lemmings can dig holes easily in the hard and icy land |
| B．Polar bears have black skin under their fur |
| C．Arctic foxes’ size is from 45 to 100 cm from head to tail |
| D．Harp seals’ thin fur and fat keep their body temperature at 40°C |
| A．art | B．animal | C．health | D．sports |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
