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问题 单项选择题 A1/A2型题

血浆中的抗凝物质是（）

A.血小板因子

B.凝血因子Ⅸa

C.Ca

D.抗凝血酶Ⅲ

E.凝血因子Ⅷ

答案

参考答案：D

解析：丝氨酸蛋白酶抑制物中最重要的是抗凝血酶Ⅲ，通过与凝血因子FⅨa、FXa、FⅪa、FⅫa等分子活性中心的丝氨酸残基结合而抑制酶的活性。

阅读理解

阅读短文，判断对(√)错(×)。

      I have a happy family. My father is a police officer. His name is Bob. He is tall and handsome. My mother

is a doctor. Her name is Mary Smith. She is short and beautiful. I am a student. I am ten years old. I'm a pretty

girl. I love my family.

( ) 1. My father is a doctor.

( ) 2. My father is tall and handsome.

( ) 3. My mother is a police officer.

( ) 4. My mother is short and beautiful.

( ) 5. I am a boy.
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判断题

当木材存在的吸附水发生变化时，木材的体积和强度将发生变化。（）
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