第34题: [单项选择]Export of handicraft products is the mainstay of the county's economy. A. rich resources B. primary concern C. only source D. main support 参考答案:D 答案解析:[解析] 本题中,mainstay意为“支柱,中流砥柱”。四个选项中,main support意为“主要支柱”;rich resources意为“丰富资源”;primary concern意为“基本关