. в каких предложения есть определение выраженное сущ.3. Chicago is the biggest railroad centre. It has a vast commerce by many railways and by the lake, and exports wheat, meat and manufactured goods. Also 40 per cent of the country's motor freight moves in and out of Chicago, More air-lines converge on Chicago than any other city of the U.S.A. 4. Chicago is also an important centre of culture and science. It is the seat of the University of Chicago and several other institutions, and has important libraries and art collections. Chicago was the site of the first nuclear chain reaction (1942) and is still a leader in nuclear research. 5. The city was from the start a big melting pot of different nationalities. About one in four Chicago citizens is black. The Chicago Negroes are almost as numerous as those in New York a city twice as large.