皮皮学，免费搜题
登录
搜题
【单选题】
很多同学都曾尝试设计制作小生态瓶，比如在一个密闭的瓶子内加入适量的河水（含微生物），植物（生产者），小鱼等水生动物（消费者），将瓶子密封，这样就形成了一个微型的生态系统，各个成分之间能较长期的保持稳定。下面罗列了设计生态瓶应遵循的注意事项，其中不合理的是（）A.
瓶内各种生物之间应有营养上的联系
B.
瓶内各种生物的数量搭配应合理
C.
瓶子应放置在强烈的阳光下，以便获得充足的能量供应
D.
瓶密闭而不能通气
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】he wanted to go out with his friends at the weekend, he had to stay behind to finish his assignment.(2008)
A.
Much though
B.
Much as
C.
As much
D.
Though much
【单选题】he wanted to go out with his friends at the weekend, he had to stay behind to finish his assignment.(2008)
A.
Much although
B.
Much as
C.
As much
D.
Though much
【单选题】____ he wanted to go out with his friends at the weekend, he had to stay behind to finish his
A.
signment. （08年真题）
B.
Much though
C.
Much as
D.
As much
E.
Though much
【简答题】苏轼的词“羽扇纶巾,雄姿英发,谈笑间樯橹灰飞烟灭”一句写的是谁?
相关题目：
参考解析：
知识点：
题目纠错 0
发布
