【单选题】年发生严重蝗灾,使作物受害面积达到 500 万亩左右。
【单选题】We don’t of her going to work in the fields in the sun.
【判断题】Fortunately, GMO seeds don't contaminate other alfalfa fields.
【简答题】Don’t assume that you know ________ advance what fields will interest you the most.
【单选题】建筑机械设备是现代建筑业的主要生产手段,是()的重要组成部分。