刘半农诗作的主要特色在于（）

有助于诊断的最简便的检查为：

A．多普勒超声检查

B．血管造影

C．螺旋CT

D．磁共振

E．胸部X线摄片

When we say older people shrink, we don’t mean they become tiny enough to fit in your pocket! We just mean that it’s common for older people to become a little shorter over time. This kind of shrinking can’t be reversed, although people can slow or stop this process. But why does shrinking happen at all?

Because of gravity (that force that keeps your feet on the ground) , cushions between the bones in the spine (脊骨), get compressed (压缩), which makes a person lose a little height and become shorter.

Another reason why some older people shrink is because of osteoporosis (骨质疏松). Osteoporosis occurs when bone is broken down and not enough new bone material is made. Over time, bone is said to be lost because it’s not being replaced. Bones become smaller and weaker and can easily break if someone with osteoporosis is injured.

Older people — especially women, who generally have smaller and lighter bones to begin with — are more likely to develop osteoporosis. As years go by, a person with osteoporosis can get small breaks in bones that are called compression fractures. These breaks cause collapse of the spine and over time the person with osteoporosis can become hunched over (驼背).

Did you know that every day you shrink a little, too? You aren’t as tall at the end of the day as you are at the beginning. That’s because as the day goes on, water in the disks of the spine gets compressed due to gravity, making you just a tiny bit shorter. Don’t worry, though. Once you get a good night’s rest, your body recovers, and the next morning, you’re standing tall again!

Smoking and drinking alcohol can make this problem worse. Want to do something right now to build strong bones? I believe what I say will help you.

小题1:Which of the following statements is true?

A．For shrinking, people can do nothing about it.

B．If someone is injured, he will become shorter.

C．Women have smaller and lighter bones than men.

D．We aren’t as tall at the end of the day as we are at the beginning.小题2:What should we do if we don’t want to shrink faster?

A．We should try to reduce gravity.

B．We should be careful not to be hurt by others.

C．We should sleep as long as possible.

D．We should keep away from smoking and drinking alcohol.小题3:What is the topic of the passage?

A．How can we stop shrinking?

B．Why do we shrink?

C．Some tips on how to keep tall.

D．How to live a healthy life.小题4:About osteoporosis we know that _______.

A．gravity is one of the causes of osteoporosis

B．once our bone is broken down, osteoporosis will occur

C．women are more likely to develop osteoporosis

D．if we develop osteoporosis, we are more likely to be shorter小题5:What will the author talk about in the paragraph to be followed?

A．Tell us how to grow taller.

B．Tell us how to become healthier.

C．Tell us how to avoid being shrinking.

D．Tell us what to do to have strong bones.

佳丽宝公司是由原来的三家企业合并而成的中型汽车配件企业。近几年，该公司的经济效果迅速提高，财务实力明显增强。但由于领导层重视生产轻视管理，使公司各项管理的基础工作十分薄弱，规章制度也不够健全完善，特别是在人力资源管理方面，绝大部分员工对公司目前的薪资制度怨声载道，严重地影响了公司生产经营活动的正常进行。为此，公司董事会决定对员工薪资制度进行一次全面调整。该公司目前一般员工实行的是技术等级工资制，采用计时工资加奖金（按月支付）的计酬方式，而管理人员实行的是职务等级工资制，按照职务高低支付工资，每个季度按照对各个部门的绩效考评结果，支付一定数额的季度奖，其奖金水平不得超过一般员工奖金水平30%。图1、图2和图3是一家管理咨询公司对该公司员工薪资满意度调查结果的分析图。

请结合上述三张结果分析图，回答下列问题：

根据薪资调查的结果分析图，说明三类人员薪资结构存在的主要问题是什么？

如图为测量滑轮组机械效率的实验装置，钩码总重6N。

（1）实验时要竖直向上  拉动弹簧测力计，由图可知拉力大小为  N。若钩码上升的高度为10cm，则有用功是  J，该滑轮组的机械效率为  。

（2）若仅减少钩码的个数，不计摩擦及绳重，该滑轮组的机械效率将   （选填“增大”、“减小”或“不变”）

债的担保