フリー問題

問題文

A link between two yard poles crosses open air for most of its path and then passes one concrete wall at the end. Which pair states what the open part of the path contributes and what the wall contributes?

選択肢

1. The link loses power for two separate reasons on the same path, so the open span grows with the measured angle and the concrete wall adds the extra attenuation in that specification.
2. The link loses power for two separate reasons on the same path, so the open span grows with the measured angle and the concrete wall adds the extra throughput in that specification.
3. The link loses power for two separate reasons on the same path, so the open span grows with the measured distance and the concrete wall adds the extra attenuation in that specification.
4. The link loses power for two separate reasons on the same path, so the open span grows with the measured distance and the concrete wall adds the extra throughput in that specification.