问题 填空题

生物体能进行呼吸,绝大数生物需要从外界吸入______,呼出______;植物也能呼吸,它吸收空气中的二氧化碳和水,在______中进行光合作用,同时释放出______.

答案

生物的特征主要有:①生物的生活需要营养;②生物能进行呼吸;③生物能排出身体内产生的废物;④生物能对外界刺激作出反应;⑤生物能生长和繁殖;⑥生物都有遗传和变异的特性;⑦除病毒以外,生物都是由细胞构成的.生物能进行呼吸,绝大多数生物需要吸入氧气,呼出二氧化碳;动物吸入氧气,呼出二氧化碳;植物也能呼吸,它吸收空气中的二氧化碳和水,在叶绿体中进行光合作用制造出自身需要的葡萄糖、淀粉等有机物,同时释放出氧气.但不同的细菌和真菌的生存需要特定的条件.有些需氧,有些则厌氧即有氧时生命活动受抑制.如醋酸菌是好氧性细菌,乳酸菌是厌氧性细菌.

故答案为:氧气;二氧化碳;叶绿体;氧气.

填空题
阅读理解

信息匹配。

     根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

     Many solutions we seek with regard to achieving sustainability(可持续性) are within our reach. That's

the lesson our school's Environment Club has learned over the past two years. We've reduced the amount of our waste at our school by 25 per cent.    1   We have the evidence we need to suggest we are making a difference. If you are interested in leading your school on a similar journey of change, here are some tips.

       2  

    Examine the garbage can to find out how much of your school's garbage could be picked out from the

waste stream and be reused. We found that more than 80 percent of our waste could have been reused,

recycled or composted (制成堆肥).

    Prepare dustbins there.

       3   You will find you can cover the cost of the purchase of the dustbins within a few months simply

by selling the bottles and other items you collect.

    Compost the waste.

    Start a composting system in your school. You may reduce your waste by as much as 50 percent. Be

sure to talk with your teachers and your cafeteria staff to get them onside.

    Share your success.

   Let your community know what you've accomplished.   4   Ask your teachers if you can talk to their

classes, let your parent group know what you're doing, and present a report to the president of your

school.

      5  

    Whether you spend a few moments in a quiet place or the whole day walking along a beautiful beach,

time outdoors will remind you why the work you do for the environment is so worthwhile.

A. Dig in.

B. Reward yourself.

C. Do outdoor activities.

D. They'll feel proud of you.

E. We need to go further, and we will.

F. Invite your friends to join your cause.

G. Make sure every classroom has dustbins for recycling.