题目

图1是某草原生态系统示意图，图2表示碳在该生态系统内部的循环情况，A、B、C是生态系统的不同生物成分， 、 、 具有捕食关系，①～⑤表示生理过程。请回答： 生物体甲乙丙丁 汞含量（ ）6.10.050.80.003 （1） 图1所示生态系统中共有条食物链，其中猫头鹰和蛇之间的关系是。 （2） 表中数据表示图1所示生态系统中某条食物链各营养级内汞（有毒物质）的含量，这种现象称为，丙代表的生物种类是。 （3） 图2中二氧化碳从第二节完形填空（共20小题；每小题1.5分，满分30分）阅读下列短文，从每小题的A、B、C、D四个选项中选出可以填入空白处的最佳选项。　　Pete Rose was a great baseball player. Though I have never met him, he taught me something 　31 that changed my life.　　Pete was being 　32 in spring training the year he was about to break Ty Cobb’s all-time hits record. Suddenly one reporter asked him, “Pete, you only need 78 hits to reach your nearest 　33 . How many at-bats（击球）do you think it’ll take you to get the 78 hits？” Without hesitation, Pete just 　34 at the reporter and said,“78.” The reporter yelled back, “Ah, come on, Pete, you don’t think you’ll get 78 hits in 78 at-bats, do you？”　　Mr. Rose calmly 　35 his philosophy with the reporters who were 　36 waiting for his reply to the claim.“Every time I 　37 up to the plate（击球区），I 　38 to get a hit! 　39 I have it in mind，I have no right to step into the batter’s（击球手）box! It is 40 expectation that has enabled me to get all of the hits in the first place.”　　When I thought about Pete Rose’s 　41 and how it applied to everyday 　42 ，I felt a little embarrassed. As a business person，I was hoping to increase my 　43 . As a father，l was hoping to be a good dad. As a married man，I was hoping to be a good husband. The truth was that I was a fairly good salesperson，I was not so 44 a father，and I was an okay husband. I immediately decided that being okay was not 　45 ! I wanted to be a great salesperson，a great father and a great husband. I 　46 my attitude to a positive one，and the results were 47 .I was fortunate enough to win a few sales trips，I won Coach of the Year in my 48 baseball league，and I share a loving relationship with my wife，Karen，with whom I am 49 to enjoy the rest of my life!　50 ，Mr. Rose!31．A．reliable 　　　　B．enjoyable 　　　　　　C．valuable　　　　　 D．unbelievable32．A．admired 　　　　 B．interviewed 　　　　　C．watched 　　　　　 D．trained33．A．decision 　　　　B．record 　　　　　　　 C．level 　　　　　　 D．goal34．A．stared 　　　　　B．shouted 　　　　　　　C．glared 　　　　　　D．pointed35．A．enjoyed 　　　　 B．shared 　　　　　　　 C．discussed 　　　　 D．reviewed36．A．anxiously 　　　 B．nervously 　　　　　　C．cheerfully 　　　　D．impatiently37．A．climb 　　　　　 B．jump 　　　　　　　　 C．drive 　　　　　　 D．step38．A．seem 　　　　　　B．fail 　　　　　　　　 C．expect 　　　　　　D．compete39．A．Though 　　　　　B．Unless 　　　　　　　 C．Because 　　　　　 D．When40．A．abrupt 　　　　　B．simple　　　　　　　 C．positive 　　　　　D．considerate41．A．plan 　　　　　　B．idea 　　　　　　　　 C．ability 　　　　　 D．behaviour42．A．agenda 　　　　　B．exercise 　　　　　　 C．work 　　　　　　　D．lire43．A．sales 　　　　　 B．skills 　　　　　　　 C．experiences 　　　 D．experiments44．A．wise 　　　　　　B．kind 　　　　　　　　 C．mean 　　　　　　　D．bad45．A．explicit 　　　　B．helpful 　　　　　　　C．enough 　　　　　　D．practical46．A．changed 　　　　 B．added 　　　　　　　　C．devoted 　　　　　 D．contributed47．A．hopeful 　　　　 B．amazing 　　　　　　　C．funny 　　　　　　 D．disappointing48．A．son’s 　　　　　B．wife’s 　　　　　　　C．friend’s 　　　　 D．customer’s49．A．supposed 　　　　B．expected 　　　　　　 C．encouraged 　　　　D．determined50．A．Good luck 　　　 B．Best regards 　　　　　C．Thanks 　　　　　 D．Congratulations