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问题 单项选择题

登记账簿必须以( )为依据，并定期进行结账、对账。

A．会计报表

B．经济业务

C．原始凭证

D．记账凭证

答案

参考答案：D

解析： 登记账簿必须以记账凭证为依据，而记账凭证是根据原始凭证填制的。

单项选择题 A1型题

初孕妇，28岁，规律性子宫收缩10小时，宫口开大8cm，胎心140次／分，胎膜未破，首选的护理措施是（）

A.肥皂水灌肠

B.人工破膜

C.立即内诊检查

D.继续观察4小时

E.做剖宫产术前准备
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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.

According to the passage, what is ATP

A．A biochemical process.

B．The tip of a root.

C．A chemical compound.

D．A type of plant cell.
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