表达式20: left parenthesis, StartFraction, "s" Over 4 , EndFraction times floor left parenthesis, min left parenthesis, "t" , StartFraction, 1 Over "s" , EndFraction , right parenthesis , right parenthesis minus .6 , StartFraction, "n" Over 4 , EndFraction times mod left parenthesis, "t" , 1 , right parenthesis , right parenthesis 为 "s" 添加滑块s4·floormint,1s−.6,n4·modt,1
添加滑块：
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表达式21: left parenthesis, .2 5mod left parenthesis, "t" , 1 , right parenthesis minus .6 , .2 5 "s" times floor left parenthesis, min left parenthesis, "t" , StartFraction, "n" Over "s" , EndFraction , right parenthesis , right parenthesis , right parenthesis 为 "s" 添加滑块.25modt,1−.6,.25s·floormint,ns
添加滑块：
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表达式22: left parenthesis, negative .6 plus StartFraction, "s" Over 4 , EndFraction , StartFraction, "n" Over 4 , EndFraction , right parenthesis 为 "s" 添加滑块−.6+s4,n4
添加滑块：
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表达式23: left brace, "x" plus .6 minus 1 eighth less than 0 : negative .3 minus 2 left parenthesis, "x" plus .6 minus 1 eighth , right parenthesis , "x" plus .6 minus 1 eighth greater than 0 : negative .3 plus 2 left parenthesis, "x" plus .6 minus 1 eighth , right parenthesis , right brace left brace, abs left parenthesis, "x" plus .6 minus 1 eighth , right parenthesis less than .0 5 , right brace 有图表。 要进行音频跟踪，按“Alt 键 + T”。x+.6−18<0:−.3−2x+.6−18,x+.6−18>0:−.3+2x+.6−18absx+.6−18<.05
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表达式24: left parenthesis, "x" plus .6 minus 1 eighth , right parenthesis squared plus left parenthesis, "y" plus .2 4 5 , right parenthesis squared equals .0 2 5 squared 有图表。 要进行音频跟踪，按“Alt 键 + T”。x+.6−182+y+.2452=.0252
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隐藏 标签 left parenthesis, negative .6 plus StartFraction, "x" Subscript, 1 , Baseline Over 4 , EndFraction , StartFraction, abs left parenthesis, "n" , right parenthesis Over 4 , EndFraction , right parenthesis equals left parenthesis, negative 0.4 1 , 1 , right parenthesis 有图表。 要进行音频跟踪，按“Alt 键 + T”。−.6+x14,absn4
标签
equals=
left parenthesis, negative 0.4 1 , 1 , right parenthesis−0.41,1
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隐藏 标签 left parenthesis, negative .6 plus StartFraction, "x" Subscript, 0 , Baseline Over 4 , EndFraction , 0 , right parenthesis equals left parenthesis, negative 0.5 5 7 5 , 0 , right parenthesis 有图表。 要进行音频跟踪，按“Alt 键 + T”。−.6+x04,0
标签
equals=
left parenthesis, negative 0.5 5 7 5 , 0 , right parenthesis−0.5575,0
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plots T=x
对学生隐藏该文件夹。
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表达式34: "x" Subscript, 1 , Baseline equals 0.7 6x1=0.76
negative 10−10
1010
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表达式35: "x" Subscript, 0 , Baseline equals 0.1 7x0=0.17
