A、<span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 14px">LL⊥VV </span>
B、<span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 14px">CC⊥HH </span>
C、<span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 14px">HH⊥VV </span>
D、<span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 14px; TEXT-DECORATION: none">CC⊥L′L′</span>
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