遇有浓雾或特大雾天能见度过低，行车困难时，应怎样做？A．开启前照灯，继续行驶 B．

In recent years, an increasing number of teenagers have the problem of obesity（肥胖）. This problem shouldn’t be ignored. It’s harmful disorder that can cause a number of health problems in children.

Many factors in life play an important role in developing obesity among teenagers. Generally, obesity happens when a Person uses more calories than he burns up. A child of fat parents is at higher risk to develop obesity. If both the parents are overweight, then there are 80% chances of developing obesity in children. Also, poor eating habits and lack of exercise can develop obesity in teenagers.

Obesity is a serious condition as it can result in many health problems in any age. Fat children are at greater risk of developing diabetes, high blood pressure, heart diseases and breathing problems. A fat child also shows signs such as daytime sleepiness, morning headache, ete.

In addition to these physical effects, obesity in children causes some serious psychological effects. Fat children car often laughed at by other for their being overweight. It can create a low self-esteem in them. It contributes to poor memory and poor performance at school. Also they hate attending the social events.

Obesity among teenagers can be treated by changing diets, increasing physical activities and taking certain medicine. Foods containing fats and high calories should be strictly removed from their diet. However, you should be careful that teenagers should get enough nutrients required for a healthy growth through their diet. You should make sure the children join in more physical activities and exercise. In some severe cases, the drugs should be given only after seeing the doctor.

公民具备基本科学素质一般指了解必要的科学技术知识，掌握基本的科学方法，树立科学思想，崇尚科学精神，并具有一定的应用它们处理实际问题、参与公共事务的能力。
根据有关调查，我国公民科学素质水平与发达国家相比差距甚大。公民科学素质水平低下，已成为制约我国经济发展和社会进步的瓶颈之一。
公民科学素质建设是坚持走中国特色的自主创新道路，建设创新型国家的一项基础性社会工程，是政府引导实施、全民广泛参与的社会行动。改革开放以来，特别是实施科教兴国战略以来，我国公民科学素质建设有了较大的发展，但仍存在许多问题。人均接受正规教育年降低于世界平均水平；因长期受应试教育影响，学生科学素质结构存在明显缺陷；社会教育、成人教育的发展尚不全面和深人；公民缺少接受终身教育的机会；科普长效运行机制尚未形成；科普设施、队伍、经费等资源不足；大众传媒科技传播力度不够、质量不高；公民科学素质建设的公共服务未能有效满足社会需求；公民提升自身科学素质的主动性尚未充分调动。
全民科学素质行动计划旨在全面推动我国公民科学素质建设，通过发展科学技术教育、传播与普及，尽快使全民科学素质在整体上有大幅度的提高，实现到本世纪中叶我国成年公民具备基本科学素质的长远目标。

下列选项中不属于公民科学素质建设的主要途径的是______。

A．科学技术开发

B．科学技术教育

C．科学技术传播

D．科学技术普及

指出下列摄片技术中，不正确的是()

A．柯氏位可显示筛窦的前后两组影

B．眼眶肿物应选择柯氏位、瑞氏位和眶缘切线位

C．上颌窦肿瘤取瓦特位外，还应摄取颅底减角位(半轴位)

D．瓦特位，两侧密度不一致(非病变所致)的原因，主要是中心线偏斜或滤线栅侧向倾斜造成的切割效应

E．眶下裂摄片采用取头颅后前正位，中心线向头侧倾斜20°

某化工厂建设单位购买了安装工程一切险并附加第三者责任险。厂房竣工交付使用后的第二天，由于原料存放不当引发剧烈爆炸，造成500万元经济损失，还导致一个路人严重受伤。在此情况下，保险人( )。

A．只需赔偿500万元的经济损失
B．对于全部损失均不予赔偿
C．只需赔偿路人损失
D．需赔偿全部经济损失和路人损失

风险控制管理措施在管理体系中主要是通过制定（）等管理措施来实现。

A、事故分析

B、运行控制程序

C、应急方案

D、应急响应