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问题 单项选择题

抗原表面与抗体结合的部位称为

A．互补决定区
B．超变区
C．抗原决定簇
D．半抗原
E．完全抗原

答案

参考答案：C

解析：抗原决定簇是指抗原分子中决定抗原特异性的特殊化学基团，又称表位。抗原通过抗原决定簇与相应的抗体结合。

听力题
用所给下列词汇的适当形式选词填空10分：
Remain  ordinary  suppose  approch  intelligent  train  event  result  impress  access
小题1:Li Kang is very          with the teachers and the technology in his new school． The English teacher’s method is very different from that in his old school and very intresting．
小题2:Mr Wood is a very        man． He knows the answer to any question．
小题3:During scientific experiments, he explains exactly what is happening and as a       my work is improving．
小题4:For many years,          camels carried food and other supplies, and returned with wool and other products．
小题5:The launch of Chang’s Ⅱwas one of the greatest          in 2010．
小题6:Now we’re leaving the business district and         the harbour．
小题7:Sometimes villages          because people from the cities have bought a “second home”in the village, where they come and stay at weekends．
小题8:We were dressed up for the party, but she was still in her       clothes．
小题9:You are not        to smoke here．
小题10:The Internet is the biggest soure of information in the world, and it’s         through a computer．
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填空题

为了保证组分测定结果的准确性，生产者应采取适当的（）和适宜的（）对所选试验方法的可靠性进行（），并将验证的方法形成（）
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