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问题 单项选择题

下列关于现金补贴和实物补贴的说法中，错误的是()。

A.现金补贴的影响涉及许多商品

B.实物补贴主要体现在农副产品价格补贴和农业生产资料价格补贴上

C.实物补贴是从补贴接受者手中转移给最终受益者

D.一般称实物补贴为"明补"

答案

参考答案：D

解析：本题考查补贴的内容。实物补贴一般称为"暗补"。

单项选择题 A1/A2型题

关于抗结核药物副作用，错误的是（）

A.异烟肼：肝功损害

B.利福平：肝功损害

C.吡嗪酰胺：肝功损害、肾功损害

D.链霉素：耳鸣耳聋

E.乙胺丁醇：视神经炎
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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 free 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 withorganic 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.

Roots have the ability to ______.

A．make proteins

B．obtain fresh air

C．produce inorganic nitrogen

D．carry out activities without energy
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