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问题 多项选择题

下列选项中，哪项为非离子型对比剂的特点( )。

A．以分子的形式存在

B．渗透压接近人体血浆

C．黏稠度低，毒性小

D．对脑、脊膜刺激轻微

E．人血后几乎不与血浆蛋白结合

答案

参考答案：A,B,C,D,E

解析： 对比剂分为高密度和低密度对比剂两类。高密度对比剂有钡剂和碘剂。水溶性有机碘对比剂分两型，离子型对比剂具有高渗性，毒副反应较多；非离子型对比剂，具有相对低渗性、低黏度、低毒性等优点，减少了毒副反应。

阅读理解

阅读理解。

     Children in America like Halloween(万圣节) very much.In the evening on the 31st of October(十月)

,they put on special clothes.Sometimes(有时) they dress(打扮) like witches and ghosts.Sometimes they

dress like kings and queens.They go to their neighbour's house and knock(敲) at the door.The neighbour(邻居) opens the door.The children say,"Trick or treat (招待)?" The neighbour gives them chocolate or

some fruit(水果). Sometimes people don't give the children any food.Then the children play a trick on them.They put soap(肥皂) on their windows.Children like this special day.They like their bags of sweets(糖果).

阅读短文，根据在文中出现的先后顺序排列下列四幅图，并根据短文内容补全句子或回答问题。(答案写在答题纸上)

图片顺序：1. ______ 2. ______ 3. ______ 4.______

5.Children can get sweets and fruit on Halloween from their ______ .

6.Many children put on ______ clothes on this special day.

7.What does “play a trick" mean(意思是) in Chinese?______

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单项选择题

经检疫合格的或经除害处理合格的入境检疫物，由口岸检验检疫机构签发( )准予入境。

A．入境货物通知单

B．入境货物检验检疫证明

C．检疫处理通知单

D．检验检疫处理通知书
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