统计资料具有客观性、合法性和相关性三个特征。（）

某物体做直线运动的v-t图象如图所示，据此判断下图（F表示物体所受合力，x表示物体的位移）四个选项中正确的是

A．

B．

C．

D．

关于成人脊髓描述正确的是

A．与椎管等长

B．下端平齐第12胸椎下缘

C．下端平齐第1腰椎下缘

D．下端平齐第2腰椎下缘

E．下端平齐第3腰椎下缘

完成句子

1．I didn't know your mobile number；otherwise,I ________________(给你打电话)the second I got

to Changsha.(ring)

2．With all these papers ________________(打分),the professor has to work extra hours tonight.

(mark)

3．The last bus ________________(离开了),we had no choice but to walk home. (leave)

4．Should ________________(不招惹它),the dog would be very calm and gentle.(tease)

5．________________(获得一块金牌)in the Asian Games in an unforgettable moment for her,which

she will never forget.(win)

6．Ours is a time of problems,of gigantic problems. Everything ________________(变换)under the

magic influence of science and technology.(transform)

7．He seemed to be looking for words at his desk with ________________(表达意思)as precisely as

I had done.(convey)

8．The fact ________________(世界是由七大洋、四大洲组成的)is known to anyone who has

common sense.(make)

9．We surely desire that we ________________(通知)immediately of any change the tour leader in the

travel schedules. (inform)

10．The church tower ________________(正在修复的)will be open to tourists soon. The work is

almost finished. (restore)

患者男，42岁。3个月前右侧腹股沟有一可变性梨形肿物。于4小时前因扛麻袋（米袋），突然增加腹压，而使肿块不能还纳，伴有剧痛、恶心呕吐，呕吐物为少许胃内容物，同时亦有腹胀、排气排便停止。查体：急性面容，BP100/70mmHg，P104次／分，心肺无异常，右阴囊部肿块（物）6cm×5cm×4cm，紧满发硬，触痛明显，精索部有柄蒂状明显增粗，而皮肤发红、触痛。腹部轻度胀满，可见肠形，肠鸣音亢进，可闻及气过水声。腹部立位X线片，亦可见阶梯状气液面。

如何判断其是否绞窄（）

A.肠壁动脉血流障碍

B.肠壁静脉回流受阻

C.包块内有渗液积聚

D.包块迅速增大

E.发生急性机械性肠梗阻

细菌致病力的强弱主要取决于（）。

A.基本结构

B.特殊结构

C.侵袭力和毒素

D.分解代谢产物

E.营养要求