单选题
Some of the low-end Made-in-China mechanical-electronic products are not selling well in export market as compared with what are termed as high-end ones.
【正确答案】
D
【答案解析】[解析] 本题考查固定用法。in export market意为“出口市场”，in the market“在市场上”在所给的四个选项中，in the export market也表示出口市场，其他三项均没有此意。所以，答案是D。