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问题 多项选择题

肝肠循环的特点是

A．使进入体循环的药量减少

B．使药物作用持续时间明显缩短

C．使药物作用持续时间明显延长

D．肝将药物或代谢物以主动转运方式向胆管分泌

E．药物口服后自肠道吸收，进入肝经胆汁分泌到肠道再被吸收形成循环

答案

参考答案：C,D,E

改错题

短文改错

文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏词符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一个横线，并在该词下面写出修改后的词。  

注意：1. 每处错误及其修改均仅限一词；

            2.只允许修改10处，多者（从十一处起）不计分。

     Li Hua and I were neighboures and we went to same school. We always went to school together.

We were good friend and had a great deal to share with every day. However, one day, Li Hua copied

my homework, which made me such angry that I did not want to be friends with him any long. Then on

Monday morning I ran downstairs without realize it was raining, but there was no time to return home to

fetch an umbrella. It happens that Li Hua was just around the corner and be offered to share her umbrella with me. He made apology to me in a gently voce. I forgave him but gave him a hug.

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问答题

为测定某有机化合物A的结构，进行如下实验．

（1）将有机物A置于氧气流中充分燃烧，实验测得：生成5.4g H2O和8.8g CO2，消耗氧气6.72L（标准状况下）．则该物质中各元素的原子个数比是______；

（2）质谱仪测定该有机化合物的相对分子质量为46；核磁共振氢原子光谱能对有机物分子中不同位置的氢原子给出不同的峰值（信号），根据峰值（信号）可以确定分子中氢原子的种类和数目．例如：甲基氯甲基醚（Cl-CH2一O-CH3）有两种氢原子（如图）．经测定，有机物A的核磁共振氢谱示意图（如图），则A的结构简式为______．
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