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【单选题】
起源于肠壁平滑肌的恶性肿瘤称( )A.
肠癌
B.
肠腺癌
C.
肠壁平滑肌瘤
D.
肠壁平滑肌肉瘤
E.
肠癌肉瘤
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举一反三
【简答题】什么是随机引物(random primer)?如何标记DNA?
【单选题】随机引物PCR的特点描述错误的是()
A.
需预知靶基因的核苷酸序列
B.
通过随机引物与模板序列随机互补
C.
扩增后可直接得到靶基因的多态性指纹图谱
D.
可用于基因组DNA图谱构建
E.
可用于临床致病菌的流行病学检测、分型
【简答题】随机引物法和切口平移法是如何对探针进行标记的?
【单选题】Directions: There are 4 passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A),B) ,C) and D). You should decide o...
A.
The author means that lots of people read few books.
B.
The author thinks that readers have only absorbed part of knowledge in books.
C.
The author holds that few people have a proper idea about what content some kind of books should include.
D.
The author considers that readers can scarcely understand most of the books.
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