单项选择题

What is the main topic of the conversation

A．It’s lethal upon contact.
B．It has relatively little harmful effect.
C．It affects the sense of hearing.
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单项选择题
A．In a department store.B．At a florist’s.C．In a supermarket.
A．In a department store.
B．At a florist’s.
C．In a supermarket.
单项选择题
A．It served as a fertilizer for crops.B．It formed a new mountain.C．It destroyed various insect pests.
A．It served as a fertilizer for crops.
B．It formed a new mountain.
C．It destroyed various insect pests.
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