1、 2015 2016 20 2 40 1 A 2016 50 B 0.8m C 10s D 35 2 A 3m 1mm B 10m 1dm C 30cm 1mm D 15cm 0.5mm 3 A 1.85cm B 3.85cm C 19mm D 1.9cm 4 32.1 3.210 0.32 A B C D 5 A B C D 6 2.04 2.06 2.07 A 2.04 B 2.06 C 2.07 D 2.057 7 A B C D 8 V= A B C D 9 M N M P P N M N A B C D 10 A 10cm/s B 9cm/s C 8cm/s D 7cm/s 11 s
2、 t a b c 5 2 A s t a B s t b C s t c D s t a 12 A B C D 13 A B C D 14 A B C D 15 A B C D 16 A B C D B 17 A B C D 18 A B C D 19 A B C D 20 A B C D 9 1 27 21 2011 11 3 1 23 0.2 / 1 30 2 22 15 m/s 23 5 24 _ 25 1 2 A B A B 26 27 A B C D 28 s 1s 5s m m/s 10s m m/s 29 30 2 31 1 27 30 AB s AB m/s BC s BC m
3、/s AC s AC m/s 31 1 1 A B A B 2 2 3 4 3 a b 90 1min min 5min t/min 0 1 2 3 4 5 6 7 8 9 T/ 90 92 94 96 98 98 98 95 98 98 min / 6 32 1 2 3 2015 2016 20 2 40 1 A 2016 50 B 0.8m C 10s D 35 A 23 23 A B 160cm 80cm=0.8m B C 0.8m 1s C D 37 D B 2 A 3m 1mm B 10m 1dm C 30cm 1mm D 15cm 0.5mm 1 2 3 2m 3m 1mm A A 3 A 1.85cm B 3.85cm C 19mm D 1.9cm 0 0 1cm 10 0.1cm=1mm 1mm 2.00cm 3.85cm L=3.85cm 2.00cm=1.85cm A 4 32.1 3.210 0.32 A B C D 32.1 3.210 =321.0 1 0.32 =3.2 D 5 A B C D 1 2 A B C D D 6