如何实施口对口人工呼吸？有何注意事项？

患者女，12岁，小学5年级学生。害怕独自一人乘电梯，进入电梯后就胸口发闷、出汗、想马上逃出电梯。平素在家里做功课时要把电视机或者音响打开，以免害怕。

需要与之相鉴别的疾病（）

A.心脏病

B.哮喘发作

C.惊恐发作

D.妄想阵发

E.强迫症

2011年“两会”期间，某政协委员提交的关于优化国民收入分配结构的提案指出，目前我国衡量贫富差距的基尼系数已经达0．46，远远超过警戒线，10%左右的家庭占有了45%的城镇居民总财产。要解决这一问题，必须 （  ）

①改革收入分配制度，调整国民收入分配结构

②加大财政、税收在初次分配和再分配中的调节作用

③整顿分配秩序，取缔非法收入，实现平均分配

④创造条件让更多群众拥有财产性收入

A．①② 　　　

B．①②③④ 　

C．①②③　　

D．①②④

电疗法基础知识中，“两个互相靠近的导体被电介质所隔开”属于（）

A.电容

B.差拍

C.等幅振荡电流

D.减幅振荡电流

E.脉冲等幅振荡电流

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.

The use of the phrase "comes in handy" underlined in Paragraph 2 indicates that the process is ______.

A．unavoidable

B．predictable

C．necessary

D．successful

智力是人们认识客观事物，并运用知识解决实际问题的能力。（ ）