城市生态系统

关于髋关节的正常活动范围，下列错误的是（）

A.0°（伸），150°（屈）

B.过伸25°

C.30°（内收），45°（外展）

D.40°（内旋），60°（外旋）

E.过伸15°

地中海大西洋文化体系

如图所示，在一直立的光滑管内放置一轻质弹簧，弹簧上端O点与管口A的距离为2x₀，一质量为m的小球从管口由静止下落，将弹簧压缩至最低点B，压缩量为x₀，不计空气阻力，则下列说法正确的是（　　）

A．小球到O点时运动的速度最大

B．小球运动由O到B过程加速度不断减小

C．弹簧的劲度系数为mg/x₀

D．弹簧的最大弹性势能为3mgx₀

It’s school time again! You’re probably feeling excited and maybe a little sad that summer is over. Some kids feel nervous or a little scared（害怕） on the first day of school because of all the new things: new teachers, new friends, and even a new school. Luckily, these “new” worries only stick around for a little while. Let’s find out more about going to a new school.

Most teachers kick off the new school year by introducing themselves and talking about all the stuff you’ll be doing that year. Some teachers give students a chance to tell something about themselves to the rest of the class, too. When teachers do the talking on the first day, they often go over classroom rules and school rules so you’ll know what’s allowed and what’s not. Please pay close attention

You might already know a lot of people in your classes on the first day, but it’s a great day to make a new friend, so try to say hello to kids you know and new ones that you don’t. Make the first move and you’ll be glad you did, and so will your new friend!

Seeing friends you haven’t seen for some time can make the first day a good one. You can make the day feel special by wearing clothes that you really like. Maybe you got a great T-shirt on one of your vacations, or a pair of sneakers（运动鞋）. It also can make you feel good to be prepared and have all the things you need, such as pencils, folders, and whatever else you’ll be needing. But make sure that you pack them the night before in case you don’t have time in the morning.

小题1:The underlined phrase “kick off” in the second paragraph probably means “_____”.

A．start

B．study

C．find

D．teach小题2:The last paragraphs mainly tell us about ________.

A．what to know about a new school

B．how to prepare for a new school

C．what to do on your first day of school

D．how to spend your first day of school小题3:According to the passage you usually do everything on the first day of school except _______.

A．introduce yourself

B．learn about the school rules

C．make new friends

D．go over your new lessons小题4:If you happen to see an old friend on the first day of school, from the passage we know that you will feel ________

A．nervous

B．lucky

C．happy

D．excited

某公司管理不善，秩序混乱，员工工作积极性不高，公司成本一直在上升，经公司讨论决定年底对员工考核，采取了以绩效考核为核心的考核内容，实行“末位淘汰制”。在实施初期良好，确实改善了员工的工作态度。但是随着“末位淘汰制”的进行，也显现出一些问题，工作做得多的人，出错率较高，坚持原则的人，得罪人最多。公司大多数中层领导对淘汰这种方法意见非常大，认为如果做得多的人被淘汰，以后谁还做那么多工作如果坚持原则的人被淘汰，以后谁还敢说真话。公司项目部业绩一直很好，在10月份就完成了全年业绩，但是却有两位员工并列末位，项目部领导一时很难做出决定。公司以绩效考核为核心考核内容，使得各部门领导在考核时左右为难，很难做出决定。

请结合对“末位淘汰制’’的综合分析，提出改进意见。(10分)