设a,b,c为实数,且|a|-a=0,|ab|=ab,[c|+c=0,则|3b|- |a+b|-|c-b|+|a-c|=().
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A.embodiedB.enrichedC.implantedD.included
A. embodied
B. enriched
C. implanted
D. included
A.aboutB.onC.underneathD.within
A. about
B. on
C. underneath
D. within
A.fromB.inC./D.for
A. from
B. in
C. /
D. for
A.BecauseB.SinceC.WhenD.While
A. Because
B. Since
C. When
D. While