正确答案: A

松科植物

题目：的孢子叶球均为单性同株。

解析：A

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举一反三的答案和解析：

[单选题]-----Ken, , but your TV is going too loud.-----Oh, I’m sorry. I’ll turn it down right now.

I hate to say this D． I need your help

[单选题]下列各种蒸汽中灭菌效率最高的是（ ）。

饱和蒸汽

[单选题]You may use the room as you like ___ you clean it up afterwards.

so long as