螺纹钢，由非合金钢经热轧扭曲成表面起螺纹的实心直条状，直径2厘米，长4米
参考答案：16(7214.2000)
解析： 查阅类、章标题，本题应归入到第七十二章“钢铁”，在一级子目中7214“铁或非合金钢的其他……”查找，在二级子目中应归入到7214.2000“带有轧制过程中产生的凹痕、凸缘……后扭曲的”，故其正确商品编码为7214.2000，其8位数字之和为16。
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| A shopkeeper closed his shop in the 1 and went home. He was very tired, he didn't 2 supper and went to bed at once. At that time the telephone rang. A man said, "What time do you open your 3 , sir?" The shopkeeper was unhappy. He thought the man played a trick on him. He did not answer it and went 4 to bed. A few minutes later the telephone 5 . He 6 and went to pick up the phone and found that voice (声音) was the 7 man and he asked the same question. The shopkeeper angrily answered. "You needn't ask me that because I can't let you 8 my shop. It's late now." "No. I want to go out." the man 9 , "My wife 10 me at home for dinner now." | ||||
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