听力原文:M:Could you describe the two people who robbed the bank?
W:Well,the man was tall with dark hair and he was wearing a black sweater.The main thing that I re membered about the woman was that she did most of the talking.
Q:What do we learn from this conversation?
(13)
A.The man did most of the talking.
B.The woman was wearing a black sweater.
C.The man and the woman robbed the bank.
D.The man and the woman had dark hair.
第1题
能正确表示a和b同时为正或同时为负的逻辑表达式是______。
A.(a>=0||b>=0)&&(a<0||b<0)
B.(a>=0&&b>=0)&&(a<0&&b<0)
C.(a+b>0)&&(a+b<=0)
D.a*b>O
第2题
能正确表示a和b同时为正或同时为负的逻辑表达式是_________。
A.a>=0
B.
C.b>=0)(a<0
D.
E.b<0)
F.(a>=0 b>=0)(a<0 b<0)
G.(a+b>0) (a+b<=0)
H.a*b>0
第3题
B.(a>=0 && b>=0)&&(a<0 && b<0)
C.(a+b>0) &&(a+b<=0)
D.a*b>0
第4题
B.(a>=0 && b>=0)&&(a<0 && b<0)
C.(a+b>0) &&(a+b<=0)
D.a*b>0
第5题
B.(a>=0 && b>=0)&&(a<0 && b<0)
C.(a+b>0) &&(a+b<=0)
D.a*b>0
第6题
B.(a>0||b>0)&&(a<0||b<0)
C.(a>0&&b>0)&&(a<0&&b<0)
D.(a+b>0)&&(a+b<0)
第7题
A.a>=0||b>=0)&&(a<0||b<0)
B.(a>=0&&b>=0)&&(a<0&&b<0)
C.(a+b>0)&&(a+b<=0)
D.a*b>0
第9题
B.(a+b>0) && (a+b<=0)
C.(a>=0 || b>=0) && (a<0 || b<0)
D.(a>=0 && b>=0) && (a<0 && b<0)
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