试题与答案

单元机组协调控制系统的主要优点是什么?

题型:问答题 简答题

题目:

单元机组协调控制系统的主要优点是什么?

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A

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某中学一张姓同学随一旅游公司外出游玩,在一公园内溺水身亡,该公园门票含保险费1.5元,保值5万元。事后,该同学家人收到公园寄来的5万元,而旅游公司却于事后才给该同学补办保险,要求保险公司作相应赔偿。保险公司依法对事故核定后,拒绝赔偿,后由法院裁决旅游公司独家承担22万元的赔偿费。

结合材料回答:

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题型:单项选择题

About fifty years ago, plant physiologists set out to grow roots by themselves in solutions in laboratory flasks. The scientists found that the nutrition of isolated roots was quite simple. They required sugar and the usual minerals and vitamins. However, they did not require organic nitrogen compounds. These roots got along fine on mineral inorganic nitrogen. Roots are capable of making their own proteins and other organic compounds. These activities by roots require energy, of course. The process of respiration uses sugar to make the high energy compound ATP, which drives the biochemical reactions. Respiration also requires oxygen. Highly active roots require a good deal of oxygen.
The study of isolated roots has provided an understanding of the relationship between shoots and roots in intact plants. The leaves of the shoots provide the roots with sugar and vitamins, and the roots provide the shoots with water and minerals. In addition, roots can provide the shoots with organic nitrogen compounds. This comes in handy for the growth of buds in the early spring when leaves are not yet functioning. Once leaves begin photosynthesizing, they produce protein, but only mature leaves can "export" protein to the rest of the plant in the form of amino acids.

Which of the following best describes the organization of the passage

A.The results of two experiments are compared.

B.A generalization is made, and several examples of it are given.

C.The findings of an experiment are explained.

D.A hypothesis is presented, and several means of proving it are suggested.

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