题目内容：
（ ）是社会经济体制变革的根本原因。 
参考答案：
答案解析：
单选题：（ ）是社会经济体制变革的根本原因。
- 题目分类：经济基础知识
- 题目类型：单选题
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Mr．Smith was engaged__________writing a novel．
Mr．Smith was engaged__________writing a novel．
No__________had I arrived there than it began to rain．
No__________had I arrived there than it began to rain．
The fourth paragraph claims that__________.
The fourth paragraph claims that__________.
They got there without any difficulty with the guide________
They got there without any difficulty with the guide__________the way．
Write on ANSWER SHEET TWO a note of about 50-60 words based
Write on ANSWER SHEET TWO a note of about 50-60 words based on the following sit