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【单选题】
路面设计选用的标准轴载 BZZ-100 是指。A.
单轮组单轴轴载 100kN
B.
双轮组单轴轴载 100kN
C.
双轮组双轴轴载 100kN
D.
单轮组双轴轴载 100kN
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【单选题】如果U={a,b,c,d,e},M={a,c,d},N={b,d,e},其中U为全集,则∁ U M∩∁ U N等于( )
A.
{d}
B.
{a,d}
C.
{d,e}
D.
∅
【单选题】如果 U ={ a , b , c , d , e } , A ={ a , c , d } , B ={ b , d , e } ,其中 U 是全集,那 C U A ∩ C U B =( )
A.
φ
B.
{ d }
C.
{ a , c }
D.
{ b , e }
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