问题 单项选择题

哪种情况会出现免疫组化检测假阳性结果()

A.固定时间过长

B.抗体浓度过低

C.抗体交叉反应

D.浸蜡、烤片温度过高

E.孵育时间过短

答案

参考答案:C

解析:抗体交叉反应。组织切片质量不佳,如刀痕裂缝边缘的组织着色过深。出血和坏死:红细胞的内源性过氧化物酶,坏死细胞释放的内源性过氧化物酶均可出现假阳性反应。

选择题
完形填空

阅读下面短文,根据以下提示:1)汉语提示,2)首字母提示,3)语境提示,在每个空格内填入一个适当的英语单词,并将该词完整地写在右边相对应的横线上,所填单词要求意义准确,拼写正确。

We may be very pleased with the rapid progress we

have made in every field of study. But we have almost done

nothing to       (改善)our present examination systems                           小题1:        

which focus on testing the students’ m        instead of                            小题2:        

their ability. As     as a child begins school, he enters                              小题3:        

a world of examination,        will decide his future of job.                       小题4:        

In fact a good examination system should     (鼓励)                                小题5:        

students to think for themselves.      the examination                                小题6:        

now does anything except that. It f      the students to                             小题7:        

remember what is taught to get     marks. Thus the students                      小题8:        

who come out first in the exam often may be the b                                 小题9:        

in their studies.       addition, such an examination system                        小题10:        

often drives teachers to take up all the time and forces them

to train students what to do with the coming examination.

I hope there must be a better way to test a student’s true

ability as well.