营养体繁殖的利用部位及代表作物？

货轮上卸下若干只箱子，其总重量为10t，每只箱子的重量不超过1t，为保证能把这些箱子一次运走，问至少需要多少辆载重3t的汽车？

关于冠脉血流量的描述错误的是（）

A.冠脉血流量和心肌代谢水平成正比

B.心率加快时，冠脉血流量增加

C.外周阻力增大，动脉舒张压升高，冠脉血流量增多

D.心动周期缩短，冠脉血流量减少

E.安静状态下，人冠脉血流量为每百克心肌每分钟60～80ml

阅读理解。

    We've all met with something that slows us down, for example, the bump (颠簸) in the road, the

setback. You just have to keep in mind that a setback is only temporary and greater things lie ahead.

Therefore, keep moving forward, developing what you have, since you've already built a solid foundation

on which you can rely.

     It is easy just to quit, give up and ignore the hard work you have put into something. But we believe in

the "two steps forward, one step back" philosophy (哲学). So how can you react when something

doesn't turn out as you've expected it to be?

     First, be objective. Step back and look at the situation. Is your setback really that significant, or will it

just require a little extra effort? Then, plan your next move. You can ask for help. Don't be afraid o

r ashamed to do this. Frequently, people are more than willing to give you support and advice. You don't

have to be perfect; after all, nobody else is. Next, bounce back. Reevaluate the goals you have set for

yourself at the beginning and retool (改组) them as necessary. Goals should be realistic and specific, but

that doesn't mean they can't be flexible. Instead of looking at your project as a disaster or a failure, view

it with success. Concentrate on how great it will feel after it is finally done, after you have put your all into

it. Instead of focusing on a possible unsatisfactory performance one single time, take a moment to sit back and reward yourself for all that you have accomplished.

     Above all, don't live with regrets. Success is never easy. It remains up to you whether you will give

up, or fight through the tough battles to earn whatever you want. Keep reaching for your goals and you

will achieve them. One small setback is nothing if you really want something and are willing to work for it.

1. According to the passage, the philosophy " two steps forward, one step back" means

    that  ___ when meeting with a setback.

A. we are supposed to quit and ignore the hard work

B. we'd better think it over before making a decision

C. we should stop to think before taking further action

D. we are expected to look at things in an allround way

2.The underlined word "it" in Paragraph 3 refers to________.

A. a performance    

B. a success

C. a goal  

D. a project

3.When suffering a setback,the most important thing to do is________.

A. to keep moving forward to your goals

B. to depend on others' support and advice

C. to sit back and reward yourself for your success

4. What is the passage mainly about?

A. How to avoid the bumps.

B. How to deal with the setbacks.

C. Different attitudes to the setbacks.

D. Different suggestions on your goals.

在使用计量器具测量之前，首先检查一下该量具、量仪（）。

A.有无计量标识

B.外观是否正常

C.指针是否归零

D.计量标识是否在有效期之内

《标准施工招标文件》合同条款中，属于不利物质条件的有( )。

A．施工期间遭遇洪水
B．进场道路出现塌方
C．遇到已废弃的地下管道
D．施工现场遇暴雪袭击