第30题: [单项选择]Often such arguments have the effect of ______ rather than clarifying the issues involved. A. blocking B. obscuring C. tackling D. prejudicing 参考答案:B 答案解析:obscure作动词,意为“使变模糊,掩盖”,例如:Sin is whatever obscures the soul.罪恶都是昧着良心干的。block意为“堵塞,阻塞;阻碍,妨碍”,例如:Woman