题目内容：
A soot forcing is unusually effective, which________.
参考答案：
答案解析：
单选题：A soot forcing is unusually effective, which________.
- 题目分类：英语(二)
- 题目类型：单选题
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Alaska was originally part of Russia,but was bought_________
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第（42）题选
第（42）题选