搜题请搜索小程序“爱下问搜题”
问题 单项选择题

下列哪项检查不应用水成像技术（）.

A.MR胆胰管造影

B.MR尿路造影

C.MR脊髓造影

D.MR内耳成像

E.MR血管造影

答案

参考答案：E

解析：磁共振水成像是新兴的影像诊断方法，采用了长TR、很长TE获得重度T2加权，使体内静态或缓慢流动的液体呈现高信号，而实质性脏器和快速流动的液体如动脉血呈低信号的技术。MRA应用了血管的成像技术。

填空题

（15分）有机物A为芳香烃，质谱分析表明其相对分子质量为92，某课题小组以A为起始原料可以合成酯类香料H和高分子化合物I，其相关反应如下图所示：                                                       

已知以下信息：

①碳烯（:CH2）又称卡宾，它十分活跃，很容易用它的两个未成对电子插在烷烃分子的C-H键之间使碳链增长。

②通常在同一个碳原子连有两个羟基不稳定，易脱水形成羰基。

回答下列问题：

（1）A的化学名称为         。

（2）由B生成C的化学方程式为                ，该反应类型为          。                                                              （3）G的结构简式为           。

（4）请写出由F生成I的化学方程式                                             。

（5）写出G到H的反应方程式                                       。                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 

（6）H的所有同分异构体中，满足下列条件的共有        种；

①含有苯环        ②苯环上只有一个取代基          ③属于酯类

其中核磁共振氢谱有五种不同化学环境的氢，且峰面积比为1:1:2:2:6的是           （写结构简式）。
查看答案
单项选择题

为减缓局麻药在硬膜外的吸收并延长其作用时间，局麻药中最常添加（）

A.利多卡因

B.多巴胺

C.异丙肾上腺素

D.肾上腺素

E.去氧肾上腺素
查看答案