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问题 单项选择题

施工总承包管理表现在质量控制方面的特点不包括( )。

A．合同交互界面比较多，应非常重视各合同之间界面的定义和管理，否则对质量控制不利

B．对分包人的质量控制由施工总承包管理单位进行

C．对分包人来说，符合质量控制上的“他人控制”原则，对质量控制有利

D．各分包合同交界面的定义由施工总承包管理单位负责，减轻了业主方的工作量

答案

参考答案：A

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.

It can be inferred from the passage that, in the early spring, the buds of plants________.

A．export protein in the form of amino acids

B．do not require water

C．have begun photosynthesizing

D．obtain organic compounds from the root
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单项选择题

突发公共卫生事件划分为（）

A、特别重大、重大、很大、一般

B、特别重大、重大、较大、一般

C、非常重大、重大、较大、一般

D、特别重大、很大、较大、一般
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