运输市场调查方法按其方式不同划分为（）。A.询问调查B.工业调查C.观察调查D.实验调查E.农业调

Energy is obtained from rivers by______.

A．building bridges across them

B．driving generators into them

C．building dams across them

D．directing them into homes and factories

Energy is obtained from rivers by ______.

A．building bridges across them

B．building dams across them

C．driving generators into them

D．channelling them into homes and factories

Energy is obtained from rivers by ______.

A．building bridges across them

B．building dams across them

C．driving generators into them

D．channelling them into homes and factories

Energy is obtained from rivers by ______.

A．building bridges across them

B．driving generators into them

C．building dams across them

D．directing them into homes and factories

Energy is obtained from rivers by ______.

A．building bridges across them

B．driving generators into them

C．building dams across them

D．directing them into homes and factories

Energy is obtained from rivers by ______.

A．building bridges across them

B．driving generators into them

C．building dams across them

D．directing them into homes and factories

Energy is obtained from rivers by ______.

A．building bridges across them

B．building dams across them

C．driving generators into them

D．channelling them into homes and factories

Energy is obtained from rivers by ______.

A．building bridges across them

B．building dams across them

C．driving generators into them

D．channelling them into homes and factories

The best information in para. 5 is that______.

A．electricity from the energy of rivers can be produced

B．oil and coal are expensive to extract and transport

C．hydroelectric power has some advantages over coal and oil

D．waterfalls can be constructed by engineers

A．Man can catch water life in rivers.

B．The rivers can be used to raise plants.

C．Many kinds of water sports can be held.

D．People can get energy from the rivers.