超星 - 美国经济第一次作业 - 查题吧

单选题

Cotton became the most profitable crop in the South mainly because of the——

A. use of irrigation on plantation
B. Whitney’s cotton gin
C. slave labour
D. improved agricultural techniques

单选题

Gold was discovered in California in ——————

A. 1828
B. 1838
C. 1848
D. 1858

单选题

The first transcontinental railroad in the US was completed in————

A. 1850
B. 1859
C. 1869
D. 1890

单选题

The agricultural Adjustment Act was an attempt to deal with the farmers’ problem of ————

A. soil erosion
B. declining labor supply
C. inflation
D. overproduction

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