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问题 单项选择题

胰岛素制剂中纯度最高的是（）

A.结晶胰岛素

B.单峰胰岛素

C.猪胰岛素

D.单组分胰岛素

E.牛胰岛素

答案

参考答案：D

解析：胰岛素按纯度分类为：①结晶胰岛素，纯度为95%。含有较多的胰岛素原、胰多肽、生长激素、胰蛋白酶等杂质，因而具有致敏性与抗原性，久用后可引起过敏反应，产生胰岛素抗体等。主要是从动物胰腺提取经结晶方式产生的胰岛素。②单峰胰岛素，将结晶胰岛素进行层析，剔除含胰蛋白酶的A峰与胰岛素原的B峰，仅取含胰岛素的C峰，使纯度达98%。③单组分胰岛素，将单峰胰岛素再经离子交换树脂处理而取得更纯的胰岛素为单组分胰岛素，纯度在99%以上。④人胰岛素，不论半合成人胰岛素或生物合成胰岛素，其结构、功能与人体内生胰岛素完全一致。

阅读理解与欣赏

阅读下面这首宋诗，完成小题。

垂　虹　亭①

米芾

断云一叶洞庭②帆，玉破鲈鱼金破柑。

好作新诗寄桑苎③，垂虹秋色满东南。

[注释]①垂虹亭：在太湖东侧的吴江垂虹桥上。，桥形环若半月，长若垂虹。②洞庭：此乃太湖之别名，非湖南省之洞庭湖。③桑苎：代佛广植桑苎的家乡。

小题1:请从修辞手法运用的角度对诗中一、二两句进行赏析。（4分）

小题2:诗歌以“垂虹秋色满东南”结尾，有何作用？（4分）
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单项选择题

I first went to hear a live rock concert when I was eight years old. My brother and his friends were all fans of a heavy metal group called Black Wednesday. When they discovered that Black Wednesday were going to perform at our local theatre, they all bought (21) for the performance. However, at the last minute, once of the friends couldn’t go, so my brother offered me the ticket. I was really excited!

I remember the buzz (嘈杂声) of excitement inside the theatre as we all found our seats. After a few minutes, the lights went down and everybody became quiet. I could barely make out the stage in the (22) . We waited. Then there was a roar from the crowd, like an explosion, as the first members of the band stepped onto the stage. My brother leaned over and shouted something in my ear, but I couldn’t hear what he was saying. The first song was already starting and the music was as (23) as a jet engine. I could (24) the drum beats and bass notes in my stomach.

I can’t recall any of the songs that the band played. I just (25) that I really enjoyed the show and didn’t want it to (26) . But in the end, after three encores (加演), the show finished. We left the (27) and walked unsteadily out onto the pavement. I felt a little dizzy, as if I had just woken from a long sleep. My ears were still (28) with the beat of the last song.

After the (29) , I became a Black Wednesday fan too for a few years before getting into other kinds of music. Once in a while, though, I listen to one of their songs and (30) I’m back at that first show.

27().

A. party

B. theatre

C. opera

D. stage
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