at表示一个具体的时间点,一个数值,而to表示一个估计值,一段数字,所以用to
(i) both of those constructions have their place in the english language. the infinitive construction, though, is usually used in one of the following situations: a) the action is to take place in the future: my block has five houses to be sold in foreclosure b) you're talking about some sort of historical accounting: pete rose became the second baseball player in history to amass 4000 career hits in this case, the '-ing' construction just sounds better to my 'native speaker's ear'. i'm not sure whether you're a native speaker (if you're not, your english is quite good), but it certainly helps for these sorts of borderline cases. (ii) 'by almost x percent' is the correct form, because the quantity did jump - by an amount that was almost x percent (and you therefore shouldn't break those words up).
to declare 表状态做表语,这里用这种表达不简洁
把网站装进口袋
随时随地练习