Until recently, losing a limb(肢) or two meant certain death for most animals. Luckily, new technology now enables us to create prostheses(假肢) for animals of all kinds! Thanks to 3D printing, for example, a cat named Dymka got four titanium feet that have given her a new lease on life!

A kind human found Dymka on the side of a road in Novokuznetsk, Siberia. The poor cat had been out in the cold for so long that all four of her feet were destroyed and needed to be cut off. Instead of euthanizing(使安乐死) the animal, a team of veterinarians and researchers from Tomsk Polytechnic University decided to try out some new technology to get Dymka moving again.

First, they took CT scans of Dymka’s legs to create detailed X-rays. Using those scans, they 3D-printed titanium rods (杆)to insert into the cat’s remaining legs. The rods attach to small rubberized feet. Scientists coated the roads with calcium phosphate(磷酸钙), turning them into a “biomaterial” to reduce the risk of infection. This way, the cat’s body can accept the rods as part of herself, rather than feeling a foreign material that could be rejected. It has been two years since Dymka got her new feet, and she is growing well! She can now walk, run, jump, and even manage stairs.

This isn’t the first time that a cat has received this sort of revolutionary treatment. Another Russian cat named Ryzhik was the first to receive new titanium feet after losing her limbs to frostbite. Dymka and Ryzhik actually live together in the medical facility that saved them. These two cats are now the best of friends!

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1.What can we learn from the first paragraph?

A Titanium is often used to produce feet.

B 3D printing can help animals walk freely.

C Animals can’t live without one or two limbs.

D Dymka survived because of new technology.

解析：选D。D 细节理解题。根据第一段可知，俄罗斯一只名叫Dymka的猫有了四只钛制的脚，让她获得了新生。故选D。

2.What had happened to Dymka before she was found?

A She lost all her feet.

B She slept and never woke up.

C She suffered serious cold injury.

D She couldn’t live in the cold.

解析：选C。C 推理判断题。根据第二段The poor cat had been out in the cold for so long that all four of her feet were destroyed and needed to be cut off.可知，这只可怜的猫在寒冷中呆了很长时间，她的四只脚都被毁了，需要截肢。由此推断Dymka被严重冻伤，故选C。

3.Which of the following statements about the titanium rod is TRUE?

A It becomes the new foot of Dymka.

B It is used to reduce Dymka’s pain.

C It isn’t accepted by Dymka’s body.

D It is the connecting part of Dymka’s limb.

解析：选D。D 推理判断题。根据第三段Using those scans, they 3D-printed titanium rods (杆)to insert into the cat’s remaining legs. The rods attach to small rubberized feet.可知，通过这些扫描，他们将3D打印的钛杆植入猫的残腿。杆再连接到小的橡胶脚上。由此说明钛杆是Dymka肢体的连接部分。故选D。

4.What can we infer from the passage?

A This treatment has been widely promoted.

B Dymka has got rid of all trouble of life.

C Ryzhik first tried using new titanium feet.

D Dymka and Ryzhik keep company with each other.

解析：选D。D 推理判断题。根据最后一段Dymka and Ryzhik actually live together in the medical facility that saved them. These two cats are now the best of friends!可知，Dymka和Ryzhik实际上一起住在拯救他们的医疗设施里，这两只猫现在是最好的朋友了。由此说明目前它们俩正彼此陪伴。故选D。