77. What is the main topic of the report?
(A) A decline in traditional farming.
(B) New weather patterns.
(C) A recipe for healthy food.
(D) An agricultural technology advancement.

Question 77 through 79 Refer to the following radio report.

Welcome back to Tech Farming Weekly. Today we are looking at a breakthrough in vertical farming. A startup in Silicon Valley has developed a new hydroponic sensor system that uses artificial intelligence to monitor root health in real time. Unlike traditional soil testing, which can take days, this system alerts farmers to nutrient deficiencies instantly via a mobile app. Early adopters report that this technology has increased their crop yield by 20% while reducing water usage.To be a game changer for urban agriculture where efficiency is key.

第 77 至 79 題請參考以下廣播報導。

歡迎回到「科技農業周刊」。今天，我們將關注垂直農業領域的突破性進展。矽谷一家新創公司開發了一種新型水耕感測器系統，該系統利用人工智慧即時監測根系健康狀況。與需要數天才能完成的傳統土壤檢測不同，該系統可以透過行動應用程式立即提醒農民養分缺乏問題。早期用戶報告稱，這項技術使他們的作物產量提高了 20%，同時減少了用水量。對於以效率為關鍵的都市農業而言，這項技術可望成為顛覆性的變革。