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$$ 判断某层 是否可见
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$$ &LYRVIS(层号)=数字1 W( t, u6 E% n, _1 k+ E1 O( T
$$( v, M& S) J, A. J
$$ 1 = &YES (层是可见的), g% i7 o& U; _* F! J ^9 P1 ]6 w
$$ 2 = &NO (层是不可见的): U# F+ P; j* _; Z, @6 T" s \
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$$ CH层号
) }) E5 O% V8 f5 Q$$ 判断某层 是否可见
5 x' d" @" r d" A5 |$$ 可见就设为不可见/ M. [! o% J$ C8 o: u
$$ 不可见就设为可见% J1 f: B6 a2 N: W! V9 r
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CH=5 * A6 Y4 v, I2 z7 M
. k8 L4 t2 Y4 g3 bIF/&LYRVIS(CH)==1,JUMP/XS:
& K! I9 J2 \0 t8 U n c2 p&LYRVIS(CH)=1
7 c5 o8 p5 N p' c; A7 kJUMP/END:
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&LYRVIS(CH)=2
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END:
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