问题
单项选择题
对常用体内诊断药物的要求，叙述错误的是
A．应在无菌条件下进行制备
B．要求标记率大于90%以上
C．显像剂室温下存放不得超过10h
D．标记化合物制备后要进行质量检测
E．选择不同的展开剂进行纸层析分析
答案
参考答案：C
解析：显像剂室温下存放不得超过6h。
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对常用体内诊断药物的要求，叙述错误的是
A．应在无菌条件下进行制备
B．要求标记率大于90%以上
C．显像剂室温下存放不得超过10h
D．标记化合物制备后要进行质量检测
E．选择不同的展开剂进行纸层析分析
参考答案：C
解析：显像剂室温下存放不得超过6h。
When you are in England, you must be very careful in the streets because the traffic drives on the left. Before you cross a street, you must look to the right first and then the left. If the traffic lights are red, the traffic must stop. Then the people on foot When you are in England, you must be very careful in the streets because the traffic drives on the left. can cross the road. If the traffic lights are green the traffic can go. People on foot mustn’t cross. In the morning and in the evening when people go to or come from work the streets are very busy. Traffic is most dangerous then. When you go by bus in England, you have to be careful, too. Always remember the traffic moves on the left. So you must be careful. Have a look first or you will go the wrong way. In many English cities, there are big buses with two floors. You can sit on the second floor. From there you can see the city very well. It’s very interesting. 小题1:In China, before you cross a street, you must look to first and then .
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