一列火车通过1200米的大桥，从车头上桥到车尾离桥恰好用了1分钟，而火车经过桥头站岗的士兵用了12秒．这列火车的长度是____ 米，速度是____ ．
照样子，写词语。
黑漆漆 ____ ____ ____
结结巴巴 ____ ____ ____
Mr Green has three _______: Jim, Jeff and Jean.
Population
(million)
% of
Income(收入)
spent on food
Persons
Per room
% of houses
With water
And electricity
Telephones
per 100
people
children in
High schools
Tokyo
28.7
18
0.9
100
44
97
Mexico City
19.4
41
1.9
94
6
62
New York
17.4
16
0.5
99
56
95
St.Paul
17.2
50
0.8
67
Osaka
16.8
0.6
98
42
Seoul
15.8
34
2.0
22
90
Moscow
13.2
33
1.3
39
Bombay
12.9
57
4.2
85
5
49
Calcutta
12.8
60
3.0
2
Buenos Aires
12.4
40
86
14
51
Los Angeles
11.5
12
35
London
11.0
24
58
