阅读下面的文言文，完成下列各题。

【甲】陈胜王凡六月。已为王，王陈。其故人尝与佣耕者闻之，之陈。扣宫门曰：“吾欲见涉。” 宫门今欲缚之。自辩数，乃置，不肯为通。陈王出，遮道而呼涉。陈王闻之，乃召见，载与俱归。入宫，见殿屋帷帐，客曰：“伙颐!涉之为王沉沉者”楚人谓多为伙，故天下传之，伙涉为王，由陈涉始。客出入愈发舒，言陈王故情。或说陈王曰：“客愚无知，颛妄言，轻威。”陈王斩之。诸陈王故人皆自引去，由是无亲陈王者。

（节选自《陈涉世家》）

【乙】项籍少时，学书不成，去；学剑，又不成，项梁怒之。籍曰：“书足以记名姓而已。剑一人敌，不足学，学万人敌。”于是项梁乃教籍兵法，籍大喜略知其意又不肯竟学。……秦始皇帝游会稽，渡浙江，梁与籍俱观。籍曰：“彼可取而代也。”梁掩其口，曰：“毋妄言，族矣！”梁以此奇籍。籍长八尺余，力能扛鼎，才气过人，虽吴中子弟，皆已惮籍矣。

（节选自《项羽本纪》有删改）

某企业现在年产值为15万元，每增加投资100元，一年就可以增加250元产值．如果新增加的投资额为x万元，年产值为y万元，那么x与y所满足的方程为____

阅读理解

    Turn left at the second crossing if you drive along Center Street north to south. If you come by bus, you can get off(下车) at the B. Street Bus Station. You can't miss it!

    Please come to the black door. Our party will be on the farm behind the house. Put your gifts into the small tent on the grass(草地). Remember : This is a surprise party, so do not let him know anything about it by the party.

    We will have a buffet lunch(自助餐) and later all kinds of interesting games for everybody!

    Music Show at 4 P.M.

    Bring your guitars, violins, drums and anything that makes sound！

    Please let me know by July 4^th if you can make it.

鞋底做花纹是为了增大摩擦力。（    ）

下列各句中没有语病的一项是（ ）