【单选题】【消耗次数：1】
下列植物需要和真菌共生才能完成生长发育的是（ ）。
①
天南星
②
重楼
③
玉竹
④
天麻
参考答案：
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相关题目
【单选题】
生长发育评价中最重要和最常用的形态指标是（ ）。
①
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②
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③
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④
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【单选题】
以下哪种情况与生长发育规律不符()
①
生长发育是连续的过程
②
各系统器官发育不平衡
③
生长发育遵循从上到下从近到远由粗到细由简单到复杂的规律
④
神经系统发育先慢后快
⑤
生长发育有个体差异
随机题目
【单选题】
某省年平均水资源总量近4200亿立方米，但年人均水资源量仅有2100立方米，低于全国约2200立方米的年人平均水平，逼近国际公认的1700立方米年人均水平水资源的紧张警戒线。上述指标：年人均水资源为（）
①
总量指标
②
变异指标
③
平均指标
④
相对指标
【单选题】
某地区城市居民和农村居民人均年收入分别为21000元和17000元，标准差分别为186元和165元，则居民人均年收入的差异（）
①
城市大
②
农村大
③
城市和农村一样
④
二者不能比较