题目

Vertical farms have the potential to reduce or eliminate the need to create additional farmland, for it is estimated that by the year 2050, the world's population __________ by 30 billion and close to 80% will live in urban areas.A. will be increasing B. will increaseC. will have increased D. has increased 答案:【答案】C【解析】考查将来完成时的用法。句意:垂直农场有减少或消除创造更多农田需要的可能,因为据估计,到2050年,世界人口将增加到300亿,近80%将生活在城市地区。根据时间by the year 2050“到2050年”,表示到将来某个时间已完成的动作用将来完成时,其构成形式是“will have+ done”,故选C。据图回答问题:(1)你认为图甲是_______(填动物或植物)细胞,因为图甲没有_________________。(2)“种瓜得瓜,种豆得豆”这种现象主要决定于细胞的__________。(3)绘生物细胞图时,图中较暗的地方,应用________________________表示,不能涂抹。
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