A humanoid (人形机器人) robot named “Xiao An” recently assisted in a science lesson at a primary school in Hefei, Anhui Province. This special class showed how artificial intelligence (AI) can be used in real education.

Xiao An is 1.4 meters tall and was developed by a local technology company. During the science lesson, which was about designing small instruments, the robot worked together with the teacher to help students explore the topic of sound. The robot acted much like a professional teacher. It can guide students step by step and encourage them to think more deeply. What makes Xiao An special is its ability to understand students’ emotions and move naturally when it talks.

When the robot entered the classroom, the children were immediately interested. For example, before class began, Xiao An imitated the sounds of different musical instruments. This made the students curious. They started guessing the names and features of the instruments, which sparked (引发) their creativity. The robot is smart enough to answer students’ questions thoughtfully. Instead of just giving simple answers, it helps them learn by encouraging them to find answers themselves.

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1. 4. How does Xiao An handle students’ questions?（推理判断）

A    By giving simple answers.

B    By ignoring their questions.

C    By encouraging self-learning.

D    By imitating instrument sounds.