关于雅思考试，小编整理了以下相关的知识点，希望对大家有所帮助。
重要干扰项指的是，某个选项虽然不是正确选项，但是却与原文不冲突或者很难判断是否和原文冲突，它们往往看起来和正确答案相似，但是却没有正确答案准确、完整、严谨。例如：
In Tarkovsky’s opinion, the attraction of the cinema is that it
A aims to impress its audience.
B tells stories better than books.
C illustrates the passing of time.
D describes familiar events.
我们可以定位到原文的C段和D段，C段提到：The frightened audience could not accept that they were watching a mere picture. Pictures were still, only reality moved; this must, therefore, be reality. In their confusion, they feared that a real train was about to crush them. 这一段文字表达了观众当时的反应，观众们很难接受自己看到的是图画而不是事实。
D段提到：The key to that magic was the way in which cinema created a dynamic image of the real flow of events. A still picture could only imply the existence of time, while time in a novel passed at the whim of the reader. But in cinema, the real, objective flow of time was captured. 这段文字描述了电影创造了事件随时间的发展演变，并且用picture和novel进行类比，强调电影的魔力是让人清楚地看到事情流畅地随时间演变。
根据以上两段，很多考生会选择A或者B选项，因为原文中提及了观众、小说的内容。A、B两个选项和原文所讲内容不矛盾。因此这两个选项属于重要干扰项。
但是当我们对两段文字仔细推敲后，会发现描述观众的反应和对比书以及电影的区别，都是为了表达电影的魔力在于表达时间随时间的发展这一主题含义。而C比A、B准确、完整。
雅思阅读之错误干扰项部分
对比重要干扰项，错误干扰项是比较容易判断出来的，它所表达的意思和原文存在着矛盾，不符合原文的意思，所以肯定可以直接排除掉。例如：
A recent survey found that in British secondary schools,
A there was more bullying than had previously been the case.
B there was less bullying than in primary schools.

C cases of persistent bullying were very common.
D indirect forms of bullying were particularly difficult to deal with.
我们看到原文，其中有一句话是：There was less bullying in secondary schools, with about one in twenty-five suffering persistent bullying. 通过这句话，我们可以明显地判断出，C项的含义与原文是矛盾的。very common和one in twenty-five的比例是明显不符的。因此，C选项就是一个错误的干扰项，我们可以确定地排除答案是C项的可能性。