①工业产品价格下降

②经济下行压力较大

③企业生产规模缩小

④企业营利能力减弱

依次填入下面横线的语句，衔接最恰当的一组是（   ）
自古以来，文艺中“实”与“虚”的调配，是一门颇费心思的技巧。        ，        ，        ，       ，         ，       ，一篇文，一幅画，倘若太“实”了，反而会失去神韵。
①“实”中有“虚”或“虚”中有“实”，在中国古代诗文和绘画作品中极为常见。
②如此做法，追求的是一种“象外之象”“此时无声胜有声”的效果。
③比如诗人写白马只写“雪中放出空寻迹，月下牵来只见鞭”，画家画寺庙只画出尖尖的屋檐一角，而留出大量空白供读者和观者去玩味。
④这就是清代王士祯所说的：“诗如神龙，见其首不见其尾，或云中露一爪一鳞而已，安得全体？”
⑤古人赋诗作画，十分讲究点与染、藏与露的关系。
⑥留出空白就是以“虚”写“实”，“虚”是对“实”的补充和扩展。

    John Clark was a postman. He was fond of dogs. However, when he was delivering（投递）letters, he found that 1dogs were his friends. One particular dog called2, who lived at No.108 Turner Road, was one of John's 3. Whenever John came near his 4house, Spot would lie in and 5out on John, barking（吠叫）and trying to 6his ankles.

    After a heavy snow,7was freezing that morning. The road was covered with8. John was afraid of 9 down, so he10his bike and walked with11steps. Unfortunately, John slipped on a patch of ice, which was opposite to No.108 Turner Road. Spot12this as John together with his bike made such a big noise.Spot jumped onto John's 13and tried to bite his neck.Quick as a flash, John,14hands were full of letters, bit15on the leg.

    John Clark said later, it was the 16thing I could do.I don't approve of（赞成）17to animals, but that dog18 had it coming. Since that day I've had no 19at No.108.Spot always hides round the 20of the house when he hears me coming.