题干

下图为某生态系统植物光合作用积累的有机物被植食动物利用过程中的能量流动示意图。有关叙述不正确的是 (     )

A:①④与植物的呼吸消耗量之和即为输入该生态系统的总能量

B:②占①④之和的百分比为这两个营养级间的能量传递效率

C:③用于植食性动物的生长、发育和繁殖

D:④⑤代表的能量可流向分解者

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B

同类题3

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    Tips to Increase Your Productivity

    Want to get more done in your day? Of course you do. ____The good news is that everyone can increase the amount of tasks they accomplish in a day. Here are some tips to help you have a more productive day.

    Make a plan for your day. Make sure you know how you want your day to go in advance, even before you start. ____ To work best, create the next day's plan the night before so that every morning you spend time performing, not planning.

    Break large tasks down into bits accomplished easily. Do you have a large project that's just so big that you keep putting it off? Or maybe you're just unsure of where to begin, so you put it off. ____Therefore, you will feel a sense of accomplishment as you check the items of your list.

    Always set your priorities (优先事项). ____Figure out what must be done, do that first and rank the rest of your work according to importance. If you don't get to the items at the end of your list, it won't be a big problem, and you can do them another time.

    ____ If you are the most productive in the morning, that's when you should hit it hard and do as much as you can. If you work better in the afternoon, take care of some things like emails in the morning and then accomplish the important projects in the afternoon. Keep on top of your work habits, and you'll be more productive.

A. Reward yourself if you are productive.

B. This can provide you a roadmap for the day.

C. Be aware of when you are the most productive.

D. It's tough to meet depressed people who are productive.

E. It's important to accomplish the most important tasks first.

F. A good way is to break the project down into more manageable ones.

G. To stay competitive in any industry, you need to improve your productivity.

同类题5

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      The freezing Northeast hasn't been a terribly fun place to spend time this winter, so when the chance came for a weekend to Sarasota. Florida. my bags were packed before you could say “sunshine. I left for the land of warmth and vitamin C(维生素C), thinking of beaches and orange trees. When we touched down to blue skies and warm air, I sent up a small prayer of gratefulness.Swimming pools, wine tasting, and pink sunsets(at normal evening hours, not 4 in the afternoon) filled the weekend, but the best part—particularly to my taste, dulled by months of cold­weather root vegetables—was a 7 a.m. adventure to the Sarasota farmers'market that proved to be more than worth the early wake­up call.

      The market, which was founded in 1979, sets up its tents every Saturday from 7 a.m. to 1 p.m., rain or shine, along North Lemon and State streets.Baskets of perfect red strawberries; the red­painted sides of the Java Dawg coffee truck; and most of all, the tomatoes:

amazing,large,soft and round red tomatoes.

      Disappointed by many a broken, vine­ripened(蔓上成熟的) promise, I've refused to buy winter tomatoes for years. No matter how attractive they look in the store, once I get them home they're unfailingly dry, hard, and tasteless.But I homed in, with uncertainty, on one particular table at the Brown's Grove Farm's stand,full of fresh and soft tomatoes the size of my fist.These were the real deal—and at that moment, I realized that the best part of Sarasota in winter was going to be eating things that back home in New York I wouldn't be experiencing again for months.

       Delighted as I was by the tomatoes in sight, my happiness deepened when I learned that Brown's Grove Farm is one of the suppliers for Jack Dusty, a newly opened restaurant at the Sarasota Ritz Carlton, where—luckily for me—I was planning to have dinner that very night.Without even seeing the menu, I knew I'd be ordering every tomato on it.