1、 2015 ( ) ( ) 300 150 Cr 52 H 1 O 16 Cu 64 S 32 Zn 65 S 32 126 13 6 1 A RNA DNA B C DNA D mRNA 2 A B C D 3 tRNA A B tRNA C tRNA D 4 S s S s 100 1800 1810 1890 1900 UGG GGU GGA GGG GGC ACU ACA ACG ACC CCU CCA CCG CCC s 99% 90% 19% 10% S 1% 10% 81% 90% A s B C D S 5 A C B C D a b 6 (M N 0 P) M N P M A
2、 B C D M 7 A B C D 8 A B C D E A B C D E C E C D E A B C B A ED B AB C CE D DE 9 1 2 3 4 A 1 NH 3B 2 NO 2 NO C 3 CH 3 COOC 2 H 5 D 4 Fe(OH) 2 10 (Na/S 8 ) ( ) ( 98) ( 119 ) Na + A a B b C nS 8 +16ne 8S n 2 D N a + 11 C 5 H 10 O 3 NaHCO 3 C 5 H 9 O 3 Na C 5 H 8 O 3 Na 2 A 10 B 11 C 12 D 13 12 10 mL 0
3、.1 mol L 1 H 2 C 2 O 4 0.1 mol L 1KOH A KHC 2 O 4 B B c(K )c(HC 2 O 4 ) c(C 2 O 4 2 )c(H )c(OH ) C C c(K )c(HC 2 O 4 ) c(C 2 O 4 2 ) c(H 2 C 2 O 4 ) :Zxxk.Com D D c(H ) c(HC 2 O 4 ) c(H 2 C 2 O 4 ) c(OH ) 13 K + Mg 2+ Fe 3+ Fe 2+ CO 3 2 NO 3 SO 4 2 I SiO 3 2 Cl BaCl 2 KSCN CCl 4 A Mg 2+ SiO 3 2 B CO
4、 2 CO 3 2 C K + Fe 2+ NO 3 I SO 4 2 D Mg 2+ Cl 8 6 48 1418 1921 6 3 0 174 14 U IR V A m s N J W C F A T V A J/C N/C B C/F T m 2 /s C W/A C T m/s D 11 22 W T A m 15 B A A B C A A B B A B C A B A B D A B A C 16 O A B A B C D 17 A B C D 18 R 1 R 2 R 3 R 4 C 1 C 2 P Q P Q A R 1B R 2C R 3D R 419 v t 1 s
5、W A 1 s 3 s 4W B 3 s 4 s 0.75W C 3 s 5 s 2W D 5 s 7 s W 20 L 1 2 L 1 L 2 L 2 A v L 2 B B A B B C B B D B B 21 15 AB E A v 0 m q t C ( ) v 0 A B C A C ( ) A B C D C AB 22 32 33 39 11 129 22 6 1 2 A B A B C 3 4 l _mm 2 _cm 3 50.0 ms _ / 3 23. 9 V 3V A(00.6A3.0A R 1 R 2 E( 3.0V ) S (1) ( ) (2) _ _ (3)
6、R v =_ 24 12 . 3.0m s AB h=0.45m. ( ) A B B B g l0m s 2(1) B v 3.0m s (2) v 1.0m s A 0.20 B (1) L 25 (20 ) A y O h C x O l. xOy y E. m q x A C A (1) C (2) B 26 (14 )S 2 Cl 2 76 138 SCl 2 SCl 2 122 59 SCl 2 S 2 Cl 2 S 2 Cl 2 (1) S 2 Cl 2 _ (2) c_ d_ (3)a _ (4)b _ (5) e _ _ _ (6) S 2 Cl 2 _ (7) S 2 Cl
7、 2 _ 27 (14 ) A B C C KOH D KOH E E H 2 O 2 F F A Cr 3+ +3OH Cr(OH) 3 H 2 O+HCrO 2 H 2 O +H + + CrO 2 : ZXXK (1) _( (2) _ (3) D 2.06 10 7 g D _ (4) _ (5) F _( ) H 2 O 2 5mol _ (6) (Sn) A _ FeCl 3 _ A Fe 2+ wg A A _( cmol L 1 A vmL( M ) _( ) 28 (15 ) 2L NO (T 1 ) (mol/L) (min) NO 0 0.100 0 0 10 0.058 0.021 0.021 20 0.040 0.030 0.030 30 0.040 0.030 0.030 40 0.032 0.034 0.017 50 0.032 0.034 0.017 (1) _
