支架预压施工的目的是（） A.消除支架的弹性变形 B.检验支架地基的承载能力和稳定性

半圆或直径所对的圆周角都是______°，90°的圆周角所对的弦是圆的______．

某机械设备安装工程项目，业主拟通过招标确定施工承包商，业主经过资格预审确定了A、B、C、D、E、F六家投标人作为潜在投标人，这六家潜在投标人在投标时出现以下情况。
A投标人在编制投标文件时主要依据设计图纸、工程量表、其他投标人的投标书，有关法律法规等。
B投标人在编制投标文件时，首先确定了上级企业管理费及工程风险和利润，接着开始计算工料及单价。
C投标人在编制施工方案时，主要从工程量要求、技术要求、施工设备要求、施工利润要求、质量要求五个方面缩合考虑。
D投标人的投标文件按照招标文件的各项要求编制后，另外附加了工期需延长10天的条件。
E投标人在投标截止时间前递交了一份补充文件，提高了投标报价。
F投标人的投标组织机构由本单位的经营管理人员和专业技术人员组成。
【问题】

去西藏最好坐汽车，虽然辛 (159) 一些，但由于从低海拔逐 (160) 往上走，高原反应可以 (161) 轻许多。一般从青海省的格尔木坐汽车到西藏的拉萨，正 (162) 情况下需要26～28小时，所以要备足干粮和水。最好的干粮我认 (163) 是压缩饼干，而不是方便面。压缩饼干是用花生粉、炒面、盐和糖等压成的，营 (164) 丰富，体积小，价格便 (165) 。

Any diet on which you eat fewer calories than you need to get through the day — like an 800-calorie-per-day diet can be dangerous. Diets that don't allow any fat also can be bad for you. Everyone needs a certain amount of fat in their diet — up to 30% of total calories — so no one should eat a completely fat-free diet.

Don't have diets that restrict （限制）certain food groups, either. A diet that requires you to say no to bread or pasta or allows you to eat only fruit is unhealthy. You won't get the vitamins and minerals you need. And although you may lose weight, you'll probably gain it back as soon as you start eating normally again.

Some people start dieting because they think all the problems in their lives are because of weight. Others have an area of their lives that they can't control, like an alcoholic parent, so they focus on something they can control — their exercise and food intake.

People who diet may get lots of praise from friends and family when they start losing pounds, which makes them feel good. But eventually a person reaches a weight level — and doesn't lose as much weight as before because the body is trying to keep a healthy weight, so they aren't any happier.

Some people may find it hard to control their eating, so they stick with an extreme diet for a little while, but then eat tons of food. Feeling guilty about the binge, they use laxatives（泻药）. Eating too little to maintain a healthy weight or eating only to throw up the calories are both eating disorders, which are harmful to a person's health.

1. Which is not the result of restricting certain food groups?

A. lose weight for a short period         B. unhealthy  

C. short of nutrition                     D. hungry

2. The reasons why some people start and keep dieting DON’T include__________.

A. They think their trouble comes from their weight.

B. They have an alcoholic parent.

C. Other people’s praise when they lose some weight.

D. There is something they can’t control except food intake.

3. The underlined phrase in the last paragraph refers to _________.

A. a fat-free diet               B. a special diet   

C. eating too much            D. eating too little

4. Which of the following statements is true?

A. A person needs about 800 calories each day.

B. A person who doesn’t eat bread is unhealthy.

C. An improper diet may cause eating disorder.

D. Fat takes up the most part of calories inside body.

5. According to the passage, when people want to lose weight, they should_________.

A. avoid eating some food that can lead to being fat   B. control their eating amount and times

C. have a healthy and balanced diet                D. throw up some of what they eat  

著名物理学家爱因斯坦说：“哲学要是不同科学接触，就会成一个空架子；科学要是没有哲学，就是原始的混乱的东西。”这表明（）

①具体科学没有哲学就会无所成就

②哲学是科学之科学

③具体科学是哲学的基础

④哲学为具体科学提供世界观和方法论的指导

A.①②

B.③④

C.①④

D.②③