正确答案: A

正确

题目：在城市是很难见到地衣植物，是由于地衣喜欢新鲜空气，对有毒气体敏感而难以生长。( )

解析：A

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举一反三的答案和解析：

[单选题]面粉主要是由小麦种子的子叶加工而成的。( )

错误

[单选题]14 What was Mrs. Franks doing when the accident took place?

Standing outside a bank

[多选题]下列植物中有性生殖产生担孢子的有( )。

黑粉菌

猴头菌

解析：BD

[单选题]Peter was so excitedhe received an invitation from his friend to visit Chongqing.

when

[单选题]裸藻门植物为单细胞，具有纤维素的细胞壁。( )

错误