正确答案: C

阿司帕坦

题目：不能作为防腐剂的是（ ）。

解析：C

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举一反三的答案和解析：

[多选题]在下列特征中，蓝藻门和红藻门相似的特征是( )。

光合色素具藻胆素

生活史中无带鞭毛的细胞

解析：AB

[单选题]大蒜的蒜瓣为( )。

腋芽

[单选题]BWhen Mary Moore began her high school in 1951, her mother told her, "Be sure and take a typing course so when this show business thing doesn't work out, you'll have something to rely on." Mary responded in typical teenage fashion. From that moment on, "the very last thing I ever thought about doing was taking a typing course," she recalls.

She didn't follow her mother's advice.

[单选题]听第6段材料，回答第 6～7 题。第6题：What is the man doing?

Trying to find his seat.

[单选题]现存蕨类中，除了极少数如水韭属和瓶尔小草属等种类外，一般没有形成层的结构。( )

正确