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What is a "Helix"

【参考答案】

"Helix" is an unrealized mechanical flying machine.

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possibilities

单项选择题

A．He should buy new exercise equipment.B．He should eat more nutritious food.C．He should consult a qualified trainer.D．He should follow other’s plan.

A．He should buy new exercise equipment.
B．He should eat more nutritious food.
C．He should consult a qualified trainer.
D．He should follow other’s plan.

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