根据短文内容判断下列句子正误。

    Wednesday，Sep，28th Today was a sunny day．In the morning，Mike and I went to Bruce's home．It was his Birthday．I bought some pencils with different animals for him．He liked them very much．Mike bought him a pencil-box．Bruce's parents bought him a big cake．After we played the chess，we ate the birthday cake and lunch together．We had a good time．

大学毕业生小王响应国家“自主创业”的号召，利用银行小额无息贷款开办了一家饰品店．该店购进一种今年新上市的饰品进行销售，饰品的进价为每件40元，售价为每件60元，每月可卖出300件．市场调查反映：调整价格时，售价每涨1元每月要少卖10件；售价每下降1元每月要多卖20件．为了获得更大的利润，现将饰品售价调整为60+x（元/件）（x＞0即售价上涨，x＜0即售价下降），每月饰品销量为y（件），月利润为w（元）．

甲乙两汽车在一平直公路上同向行驶，在t=0到t=t₁的时间内，它们的v﹣t图象如图所示．在这段时间内（   ）