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[单选题]
P,Q,R都是4bit的输入矢量,下面哪一种表达形式是正确的()
A.input [3:0] P,Q,R
B.input [3:0] P,Q,R
C.input P,Q,R[3:0]
D.input P[3:0],Q,R
E.input P[3:0],Q[3:0],R[3:0]
F.input [3:0] P, [3:0]Q, [3:0]R
![](https://lstatic.shangxueba.com/sxbzda/h5/images/tips_org.png)
A.input [3:0] P,Q,R
B.input [3:0] P,Q,R
C.input P,Q,R[3:0]
D.input P[3:0],Q,R
E.input P[3:0],Q[3:0],R[3:0]
F.input [3:0] P, [3:0]Q, [3:0]R
第4题
A、4CH3CH2NH2 (乙胺) (l )+ 19O2 (g) = 4NO2(g) + 8CO2 (g)+ 14H2O(l )
B、CH3CH2NH2 (乙胺) (l)+ 19/4O2 (g) = NO2(g) + 2CO2 (g)+ 7/2H2O(l)
C、N2H4(肼,g) + O2(g ) = N2(g) + H2O(g)
D、N2H4(肼,g) + O2(g ) = N2(g) + 2H2O(l)
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