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【简答题】

N段含有4个EcoRⅠ酶切位点: 上述DN段存在若干突变体,这些突变体用同种酶完全酶切,电泳后结果如图所示,其中*代表带有标记的片段。可否确定发生了何种突变?

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参考解析:
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刷刷题刷刷变学霸
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【单选题】下面哪个代码片段是错误的?( )

A.
package mypackage; public class Rectangel {//doing something...}
B.
import java.io.*; package mypackage; public class Rectangel {//doing something...
C.
import java.io.*; class Circle{//doing something} public class Rectangel {//doing something ...}
D.
import java.awt.*; import java.io.*;package mypackage; public class Rectangel {// doing something...}