题目内容

Wha do we learn about animals that sleep through winter?

A. They have their weight reduced to minimum.
B. They consume energy stored before the long sleep.
C. They can maintain their heart beat at the normal rate.
D. They can keep their body temperature warm and stable.

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How do animals like mice adapt to the severe winter?

A. By staying in hiding places and eating very little.
By seeking food and shelter in people’s houses.
C. By growing thicker hair to stay warm.
D. By storing enough food beforehand.

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Why do some birds fly in groups for migrating according to the speaker?

A. To stay safe.
B. To save energy.
C. To keep company.
D. To protect the young.

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What is the main idea of this passage?

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蒙皮拉形的优点主要有____。

A. 模具构造简单
B. 零件表面质量好
C. 成形准确度高
D. 效率高

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Wha do we learn about animals that sleep through winter?

A. They have their weight reduced to minimum. B. They consume energy stored before the long sleep. C. They can maintain their heart beat at the normal rate. D. They can keep their body temperature warm and stable.

How do animals like mice adapt to the severe winter?

Why do some birds fly in groups for migrating according to the speaker?

What is the main idea of this passage?

蒙皮拉形的优点主要有____。

A. They have their weight reduced to minimum.
B. They consume energy stored before the long sleep.
C. They can maintain their heart beat at the normal rate.
D. They can keep their body temperature warm and stable.