蒸汽转化制氢原料最适宜选用平均相对分子质量小，低含硫的不饱和烃类。
参考答案：错
解析：蒸汽转化制氢原料选用平均相对分子质量小，低含硫的饱和烃类。
《清代敕书两则》反映了台湾自（）代以来就处于我国中央政府的有效管理之下。
Directions: Last month you bought a pair of leather shoes from a shop. But now you find that the shoes are in bad quality. Write a letter to the manager of the shop to explain
1) your complain,
2) the problem with the shoes, and
3) your request.
You should write about 100 words on ANSWER SHEET 2. Do not sign your own name at the end of the letter. Use "Li Ming" instead. You do not need to write the address. (10 points)
