下列电池不属于浓差电池的是( )。 A: Tl(Hg)(a1)|Tl+(aq)|Tl(Hg)(a2) B: Na(Hg)(A)| NaCl(m1)|AgCl(s)|Ag(s)—Ag(s)|AgCl(s)| NaCl(m2)|Na(Hg)(A) C: Ag(s)|AgCl(s)|NaCl(aq)|Na(Hg)(A)|NaCl(CH3CN溶液)|Na(s) D: Na(Hg)(A)|NaCl(m1)|| NaCl(m2)|Na(Hg)(A)
下列电池不属于浓差电池的是( )。 A: Tl(Hg)(a1)|Tl+(aq)|Tl(Hg)(a2) B: Na(Hg)(A)| NaCl(m1)|AgCl(s)|Ag(s)—Ag(s)|AgCl(s)| NaCl(m2)|Na(Hg)(A) C: Ag(s)|AgCl(s)|NaCl(aq)|Na(Hg)(A)|NaCl(CH3CN溶液)|Na(s) D: Na(Hg)(A)|NaCl(m1)|| NaCl(m2)|Na(Hg)(A)
下列电池不属于浓差电池的是: () A: Tl(Hg)(a1)|Tl+(aq)|Tl(Hg)(a2) B: Na(Hg) |NaCl(m1)|| NaCl(m2)|Na(Hg)A. C: Na(Hg) | NaCl(m1)|AgCl(s)|Ag(s)—Ag(s)|AgCl(s)| NaCl(m2)|Na(Hg)A. D: Ag(s)|AgCl(s)|NaCl(aq)|Na(Hg) |NaCl(CH3CN溶液)|Na(s)
下列电池不属于浓差电池的是: () A: Tl(Hg)(a1)|Tl+(aq)|Tl(Hg)(a2) B: Na(Hg) |NaCl(m1)|| NaCl(m2)|Na(Hg)A. C: Na(Hg) | NaCl(m1)|AgCl(s)|Ag(s)—Ag(s)|AgCl(s)| NaCl(m2)|Na(Hg)A. D: Ag(s)|AgCl(s)|NaCl(aq)|Na(Hg) |NaCl(CH3CN溶液)|Na(s)
设有关系R,S和T如下。关系T是由关系R和S经过哪种操作得到的 R A B C 1 2 3 4 1 6 3 2 4 S A B C 4 1 6 2 7 1 T A B C 1 2 3 3 2 4 A: R∪S B: R-S C: R×S D: R+S
设有关系R,S和T如下。关系T是由关系R和S经过哪种操作得到的 R A B C 1 2 3 4 1 6 3 2 4 S A B C 4 1 6 2 7 1 T A B C 1 2 3 3 2 4 A: R∪S B: R-S C: R×S D: R+S
4 Complete the words. ► l u n g c a n c e r lung cancer 1 m _ m _ r _ l _ _ s s ____ 2 a r _ r _ t i c ____ 3 b r _ _ n ____ 4 b l _ _ _ ____ 5 s t r _ _ e ____ 6 h _ _ r t d _ s _ _ s e ____ 7 d _ s _ b _ l _ t y ____
4 Complete the words. ► l u n g c a n c e r lung cancer 1 m _ m _ r _ l _ _ s s ____ 2 a r _ r _ t i c ____ 3 b r _ _ n ____ 4 b l _ _ _ ____ 5 s t r _ _ e ____ 6 h _ _ r t d _ s _ _ s e ____ 7 d _ s _ b _ l _ t y ____
具有最大摩尔熵的物质是: A: Hg(l) B: Hg (g) C: HgO(s) D: Hg(NH2)2(s)
具有最大摩尔熵的物质是: A: Hg(l) B: Hg (g) C: HgO(s) D: Hg(NH2)2(s)
下列Visual Basic程序段是计算()公式的。<br/>s=0:t=1<br/>For I=1 To 10<br/>t=t*I<br/>s=s+t<br/>Next I A: s=1+2+3+4+5+6+7+8+9+10 B: s=1*2*3*4*5*6*7*8*9*10 C: s=1!+2!+3!+4!+5!+6!+7!+8!+9!+10! D: s=1+2*3+3*4+4*5+5*6+6*7+7*8+8*9+9*10
下列Visual Basic程序段是计算()公式的。<br/>s=0:t=1<br/>For I=1 To 10<br/>t=t*I<br/>s=s+t<br/>Next I A: s=1+2+3+4+5+6+7+8+9+10 B: s=1*2*3*4*5*6*7*8*9*10 C: s=1!+2!+3!+4!+5!+6!+7!+8!+9!+10! D: s=1+2*3+3*4+4*5+5*6+6*7+7*8+8*9+9*10
质点沿x轴作直线运动,a=t,t=0时x0=1m,v0=2m/s,则t=2s时质点的速度大小和位置分别是( A: 6(m/s) ;9(m) B: 4(m/s) ;19/3(m) C: 2(m/s) ;7/3(m) D: 2(m/s) ;4/3(m)
质点沿x轴作直线运动,a=t,t=0时x0=1m,v0=2m/s,则t=2s时质点的速度大小和位置分别是( A: 6(m/s) ;9(m) B: 4(m/s) ;19/3(m) C: 2(m/s) ;7/3(m) D: 2(m/s) ;4/3(m)
7 d _ s _ b _ l _ t y ____
7 d _ s _ b _ l _ t y ____
2 Complete the missing letters. ► m o v i e movie 1 g _ _ b _ g _ ____ 2 s _ b _ _ y ____ 3 c _ _ s _ t ____ 4 c _ _ d y ____ 5 a t _ _ _ n _ y ____ 6 g _ s _ l _ _ e ____ 7 t r _ _ _ p_ _ t _ t _ _ n ____ 8 b _ l l _ _ _ d ____
2 Complete the missing letters. ► m o v i e movie 1 g _ _ b _ g _ ____ 2 s _ b _ _ y ____ 3 c _ _ s _ t ____ 4 c _ _ d y ____ 5 a t _ _ _ n _ y ____ 6 g _ s _ l _ _ e ____ 7 t r _ _ _ p_ _ t _ t _ _ n ____ 8 b _ l l _ _ _ d ____
1 Complete the words. ► k n i c k e r s knickers 1 _ n d _ r w _ _ r ____ 2 m _ t _ r _ _ l ____ 3 s l _ _ v _ ____ 4 t i _ _ t s ____ 5 s _ _ d e ____ 6 n _ c k l e ____ 7 b l _ _ s e ____ 8 e a _ _ i n s ____ 9 v _ _ t ____ 10 b _ _ t t _ n ____
1 Complete the words. ► k n i c k e r s knickers 1 _ n d _ r w _ _ r ____ 2 m _ t _ r _ _ l ____ 3 s l _ _ v _ ____ 4 t i _ _ t s ____ 5 s _ _ d e ____ 6 n _ c k l e ____ 7 b l _ _ s e ____ 8 e a _ _ i n s ____ 9 v _ _ t ____ 10 b _ _ t t _ n ____