题目内容

音的长短我们成为音值

A. 对
B. 错

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Low-frequency RFID systems have short transmission ranges.

A. 对
B. 错

In general, the lower the frequency, the more expensive the system.

A. 对
B. 错

High-frequency RFID systems offer short transmission ranges.

A. 对
B. 错

When activated, the antenna transmits data back to the tag.

A. 对
B. 错