Bolivia has a population three and a half million . About one tenth of the total population are white ; one-fourth are mixed Indians and white ; and more than half are full-blooded Indians . The government and the industries are under the control of the white people .
The Indians today live in much the same way as their ancestors . Most of them are farmers . Many work in the mines , for mining is the most important industry on Bolivia’s . Of all the mining products , tin is the most important , which makes up three-fourths of all Bolivia’s exports . The eastern slopes of the Andes , since there are very few roads there , are fertile but not highly developed . The two primary means of transportation are river boats and porters . East of the hill region are the great plains where tropical plants are grown . A serious problem for Bolivia is the transport of food from the warm regions , where it is grown to the mountainous regions , where most of the people live .
Bolivia gained its independence from Spain about a hundred years ago . It has been slow in developing , but its rich resources promise a better future in it .
小题1:The majority of the Bolivian population are .
A．full-blooded Indians
B．mixed Indian and white
C．white citizens
D．all whites and mixed-blooded people小题2:The Indian’s way of life today is
A．quite different from that of their ancestors
B．quite interesting
C．almost the same as their ancestors’
D．very exciting小题3:The main product Bolivia exports is
A．tropical plants
B．gold and silver
C．tin
D．food小题4:Bolivia has been slow in developing , but it has hope for a better future because of its .
A．mining products
B．rich resources
C．independence from Spain
D．two primary means of transportation
（4） Fe单质的晶体在不同温度下有两种堆积方式，晶胞