注意：下面出现的“考生文件夹”均为c：\wexam\25160001。 在考生文件夹

某校初三（2）班的师生到距离10千米的山区植树，出发1个半小时后，张锦同学骑自行车从学校按原路追赶队伍，结果他们同时到达植树地点，如果张锦同学骑车的速度比队伍步行的速度的2倍还多2千米．

（1）求骑车与步行的速度各是多少？

（2）如果张锦同学要提前10分钟到达植树地点，那么他骑车的速度应比原速度快多少？

下图是组织细胞的生理活动与人体四大系统相关联的图解。其中a、d、f表示人体内的物质，b和c表示体内的气体，①与②表示血管，A与B表示吸收物质的过程。请据图回答以下问题：

(1)淀粉消化为[a]___________，才能被小肠吸收。小肠与过程A相适应的结构特点是______________。

(2)组织细胞进行呼吸作用所需的气体是图中[b]_________，其扩散到肺部的毛细血管后，必须与血液中的____________结合，才能运输到组织细胞中。

(3)组织细胞代谢产生的含氮废物，随着血液流经肾脏处理后，血管②与血管①相比，②中的血液内含量明显降低的物质是________________。

若上侧切牙缺牙间隙小，而尖牙牙根长大，且牙体切角缺损，下颌对颌牙为局部义齿，此时最好的设计是（）

A.单端固定桥

B.粘结桥

C.活动义齿

D.双端固定桥

E.种植义齿

The recent decline in land prices has hurt many institutions that had invested heavily in real estate. Last year, before the decline began, a local college added 2,000 acres to its holdings. The college, however, did not purchase the land but received it as a gift. Therefore the price decline will probably not affect the college.
Which of the following, if true, casts most doubt on the conclusion above

A．The 2,000 acres that the college was given last year are located within the same community as the college itself.

B．The college usually receives more contributions of money than of real estate.

C．Land prices in the region in which the college is located are currently higher than the national average.

D．Last year, the amount that the college allocated to pay for renovations included money it expected to receive by selling some of its land this year.

E．(E) Last year, the college paid no property taxes on land occupied by college buildings but instead paid fees to compensate the local government for services provided.

在烟草苗床的（）期，即使短期，也会给幼苗生长带来极大危害，甚至造成烟苗死亡。

A．出苗至十字

B．十字至生根

C．生根至成苗

D．出苗至成苗