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问题 单项选择题

洗脱液的质量控制下列哪种说法是错误的（）。

A.99mMo可增加对患者的辐射吸收剂量、影响显像质量，其含量应低于0.1%

B.载体99mTc可由99mMo和99mTc衰变产生，其含量随淋洗时间间隔和洗脱液放置时间增长而增高，故应多延长淋洗时间

C.Al可影响放射性药物的标记和体内分布，如可使某些放射性药物在肝脾中浓聚，Al含量应低于10μg／ml

D.99mTc增长到最大值的时间为22.8小时

E.99mMo含量可用740～780keV能谱分析测定

答案

参考答案：B

解析：淋洗时间间隔和洗脱液放置时间增长，由于射线对水的辐射分解产生的过氧化物游离基含量还会增加，影响洗脱液质量，故一般淋洗时间间隔为24小时。

判断题

来我国居留不超过8个月的旅游者，携带海关认为必须复运出境的物品，由海关登记后放行，旅游者出境时必须将原物带出。
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填空题

Good afternoon, everybody. I’m pleased to be here with you, graduates of 2007. I’m a (1) , and students often approach me with (2) . You see, we are living in a society of great changes. With the presence of (3) , the process of getting a job in today’s world has changed for (4) .
Well, how can you use new technologies to help you First, let’s look at how you (5) . The traditional method of hunting for a job in the past required first, doing research on jobs that were (6) , typically by looking in newspapers, periodicals and magazines, as well as TV ads, and (7) . Then you decided where and for what post you were going to apply, put your resume (8) in a stamped envelope, and waited anxiously for someone to (9) .
Well, today, maybe the job search and (10) are very much the same, but the tools used are much more advanced, and they (11) . In fact, technology has not so much changed the process as enhanced it. The benefit, both for (12) , is that this makes the search more open to people of (13) from all over the world. But as more people are involved, it becomes (14) for the applicant than it ever was before.
The (15) for the working world today is learning these new and (16) and combining them with the older methods people have been using for years. For example, (17) , you can research employment not just in your city, but also in your state, your country, and (18) . You can copy information from a web page and paste it into a Microsoft Word document that’s easy to (19) . In many ways, it’s easier now: Just type your job application, click, and (20) ; it gets there in an instant.
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