皮皮学，免费搜题
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【单选题】
Cathy: Good afternoon. I've just joined the library. How many books can I take out? Emily: You can take two books, and keep them for ten days. If you haven't finished, you can renew them. Cathy: How do I do that? ______ Emily: No, you can telephone. Tell us the titles of the books, and the date they are due for return. Cathy: Splendid. I would be A Tale of Two Cities, or David Copperfield. Emily: These two books have been lent.A.
Why can't I keep them for a longer time?
B.
Must I visit the library?
C.
How much could I be fined?
D.
Can I lend them to my friends?
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】关于精子形成的描述下列哪项是错误的
A.
形成以前要经过复杂的形态结构变化
B.
细胞的体积变小但变长
C.
精子细胞分裂而来
D.
细胞核浓缩变小
E.
多余的细胞质要被去除
【单选题】关于神经元亚细胞结构的描述,错误的是
A.
胞体结构包括：胞膜、胞核和核周质。
B.
胞突中代谢和功能活动所需要的蛋白质几乎都是胞体内合成，运送至胞突
C.
神经元的原发转运系统主要是Na﹢、-K﹢泵，需要ATP的参与
D.
轴突在形态上市一个缺乏有力核蛋白和粗面内质网的三角形或扇形
E.
轴突外被髓鞘，末梢分为纤维终末并失去髓鞘