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【单选题】

每个声音片段中都包括()
①音高
②音强
③音质
④音长

A.
①②③
B.
②③④
C.
①③④
D.
①②③④
题目标签:片段声音音高
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参考解析:
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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...}