The data accumulated was obtained through______

A:observation by social psychologists B:conversations with mothers of the children C:interviews, school records and physicians' reports D:observation of fathers with their children

These figures are not consistent ______ the results obtained in previous experiments.

A:to B:for C:with D:in

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

Information obtained from libraries is sooner forgotten than .

A:it from life B:that from life C:what from life D:which from life

Information obtained from libraries is sooner forgotten than .

A:it from life B:that from life C:what from life D:which from life

Information obtained from libraries is sooner forgotten than .

A:it from life B:that from life C:what from life D:which from life

Main diesel engine control can be obtained by the bridge .

A:at any time B:only after the engine room control station is switched to ‘bridge control ’ C:whenever the secondary station is switched to ‘bridge control ’ D:whenever the engine side control station is switched to ‘bridge control ’