[单项选择]（）在电网方式超出已有运行规定范围时，负责相应运行方式计算分析，给出机组出力、断面潮流、电压等控制限值，会签日前电能平衡计划、运行安排及风险点分析，提出相应电网控制调整建议和意见。
A. 调度计划专业
B. 调度运行专业
C. 系统运行专业
D. 继电保护专业

患儿男，7个月。咳嗽1周余，3天前起咳嗽加重伴发热，体温波动于37.5～38.3℃，半天来突然烦躁、气促急诊入院。查体：T37.5℃，P185次/分，R65次/分，体重8kg，头围44cm，神倦，烦躁不安，面色苍灰，明显喘憋。方颅，前囟2.5cm×2.5cm。鼻扇，口周发绀。轻度漏斗胸，肋缘外翻，心率185次/分，律整，心音低钝，无杂音，双肺可闻多量喘鸣音及中小水泡音，呼气延长。肝右肋下3.5cm，质软，边略钝，脾未扪及。入院后床边胸片示双肺纹理增粗，可见小斑片状阴影多处，轻度肺气肿。

If it were only necessary to decide whether to teach elementary science to everyone on a mass basis or to find the gifted few and take them as far as they can go, our task would be fairly simple. The public school system, however, has no such choice, for the jobs must be carried on at the same time. Because we depend so heavily upon science and technology for our progress, we must produce specialists in many fields. Because we live in a democratic nation, whose citizens make the policies for the nation, large numbers of us must be educated to understand, to support, and when necessary, to judge the work of experts. The public school must educate both producers and users of scientific services.
In education, there should be a good balance among the branches of knowledge that con tribute to effective thinking and wise judgement. Such balance is defeated by too much emphasis on any one field. The question of balance involves not only the relation of the natural scienc
A. One of the major tasks of education is to discover the most promising students.
B. In order to teach effectively, educators are requested to lay emphasis on one particular field.
C. Some subjects have been over-emphasized in public schools.
D. The progress of the society cannot merely rely on inventors.