填空题

Why are some engineers trying to improve the handlebars

【参考答案】

They may kill children.
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单项选择题
A．When they wanted to kill an enemy.B．When they wanted to identify a stranger.C．When they wanted to tell the time of the day.D．When they wanted to send a message to a person far away.
A．When they wanted to kill an enemy.
B．When they wanted to identify a stranger.
C．When they wanted to tell the time of the day.
D．When they wanted to send a message to a person far away.
填空题
clothing
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