填空题
英语四级
2008-11-10
Which of the two energy sources you use depends on the intensity and 6 of your activity?
参考答案
暂无
答案解析
【解析】选[C]。空前的and表明此处应填与intensity并列的名词，故[C]duration和[N]amount入选。下段中的if your aerobic activity is low to moderately intense and of long duration提示此处应填[C]duration(时间段)0此句是说，采用这两种能量消耗来源中的哪一种取决于你活动的强度和时间长度。