题目

Today was a very big day for me and I had already ordered up a pile of books I needed in the University Library from home by about 10:15. Off I went at 10:30 to the University Library, to get all those references. Only trouble was that when I arrived I discovered I hadn’t got my university card that would open the library’s electronic entrance, and every other place I needed to access. I had had it in another library the night before (which was where I strongly suspected it still was), but the immediate dilemma was this: should I (Plan A) try using the old university library card I下列选项中生物共同特征较多的是（　　）A．种子植物门B．蔷薇目C．百合科D．单子叶植物纲