题干

许多同学设计制作小生态缸,评价其设计制作水平的主要标准是(  )

A:生态系统维持时间的长短

B:生态系统营养结构的复杂程度

C:生态系统有机物积累的速度

D:生态系统的成分是否全面

上一题 下一题 0.0难度 选择题 更新时间:2018-10-23 02:56:44

答案(点此获取答案解析)

A

同类题2

阅读理解
    As I grow up, I gradually know that life plays a very important role in my education I really wanted to achieve. What I mean is that life can teach you things no one else can. Luckily for you, it's time to have lessons of life. Pay attention and you can know what I call the school of life.
    Use Your Head
    You have to be smart to survive (生存) in this world. Anytime you need to make a move, stop and think. Obviously there will be times when you need to take action first, but if you've been taking the time to plan, you'll always make the right choice. Fail to plan, plan to fail.
    Set Your Goals
    In my team, if you don't finish the job well, we will fire you. Your goals should be on building a basic of solid and complete work. Make certain a list of what you have to do and start with the biggest and most difficult task. The key here is goals.
    Respect Your Superiors (上级)
    Your boss is in his position for a reason, no matter what you think of him. If he's not the best one, be patient—he'll be out of there soon. In the meantime, you have to respect him as your superior. That means following orders and closing your mouth. If you don't respect your boss, how will you expect the people under you to do the same?
    Keep Your Cool
    You should never let your emotions (情绪) control you. You should learn to keep calm. Never lose your cool when dealing in business, or it will ruin the whole thing.
    The school of life can be hard, but if you're smart and play your cards right, you can come out with an A+. Just treat every situation as a learning experience. I hope you've studied.