【名词&注释】
通货膨胀(inflation)、宏观经济(macro-economy)、生产活动(production activity)、主要因素(main factors)、对外贸易依存度(foreign trade dependence degree)、经济周期波动(economic fluctuation)、对外贸易量(quantum of foreign trade)、贸易总额(total volume of trade)、对外贸易额(volume of foreign trade)、对外贸易差额(balance of foreign trade)
[单选题]一国在一定时期内进口和出口的贸易总额(total volume of trade)之和,称为()
A. 对外贸易差额(balance of foreign trade)
B. 对外贸易额(volume of foreign trade)
C. 对外贸易量(quantum of foreign trade)
D. 对外贸易依存度