题目内容
(请给出正确答案)
[多选题]
A:__________? B: It sells at $ 2 a bottle.
A、How much do you charge for it
B、How much should I pay for it
C、How much does it cost
D、What does it sell
答案
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B、How much should I pay for it
C、How much does it cost
D、What does it sell
第2题
若,则a,b应满足______.
(A)a=b或a=-b (B)a=0且b=0 (C)a=-b且a=b (D)a=0或b=0
第4题
A.[a,b]b,a]
B.[[b,a],[a][b]]
C.[[a],[a,b][b]]
D.[[b],[b,a],[a]]
第6题
指出下列错误的式子. ( )
A.A?(B?C)=(A?B)?C
B.A?B=B?A
C.
D.A∩(B?C)≠(A∩B)?(A∩C)
第7题
以下定义语句中正确的是( )。
(A)char a='A'b='B'; (B)float a=b=10.0;
(C)int a=10,*b=&a; (D)float*a,b=&a;
第9题
下面属于逻辑运算的是:( )
(A) a^b (B) b&&a (C) !a (D) a||b