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题目：
单选题
A刺激中枢化学感受器转而兴奋呼吸中枢
B直接刺激呼吸中枢
C刺激颈动脉体和主动脉体化学感受器
D刺激脊髓呼吸神经元
答案：
<查看本题扣1积分>
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“宇宙飞船理论”是低碳经济提出的重要原理。
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带传动中，增大包角的主要方法有哪些？
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小亮是小学三年级的学生，父母一年前因感情破裂而离婚，小亮被判给母亲抚养。母亲李女士单位效益不好，最近下岗了，父亲则因为经商失败，开始拖延支付抚养费用。母亲压力很大，对小亮的管教也非常严厉，经常打骂小亮。而小亮的学校班主任老师发现小亮在学校里也开始对同班同学使用暴力，并且经常撒谎，不交作业。社区工作者由此对小亮及李女士进行了家庭服务，针对其家庭具体情况采取了一系列措施：对小亮的情绪进行疏导，帮助小亮理解母亲对他的良苦用心，增强小亮的自我认同感和自信心；与李女士进行沟通，教导其家庭养育技能，让其认识到以往的管教方式对小亮造成的身心危害，改正其打骂儿子的管教方式，缓解母子之间的紧张关系；通过合理途径为小亮争取父亲的抚养费用，并且鼓励协助小亮的母亲找到一份工作。本案例中体现了社会工作价值观的哪些内容（）。
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注意力缺陷多动症的症状不包括（）
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会展经济
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患者，男，21岁，长跑运动员，左侧面部、双手深Ⅱ。烧伤，经抗感染和创面处理1周。患者自烧伤后沉默寡言，情绪低落，家属要求康复介入。如果患者面部创面刚愈合在瘢痕增殖期选用哪几种治疗（）
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螺旋外钩由接头、钩杆、螺旋锥体组成。
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柴油机的下止点是指：（）
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国标规定，双硫腙比色法测锌时，用什么试剂防止铜、汞、铅、铋与镉离子的干扰？（）
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The task of being accepted and enrolled(招收)in a university begins early for some students. Long【C1】______they graduate from high school. These students take special【C2】______to prepare for advanced study. They may also take one of more examinations that test how【C3】______prepared they are for the university. In the final year of high school, they【C4】______applications and send them, with their student records, to the universities which they hope to【C5】______. Some high school students may be【C6】______to have an interview with representatives of the university: Nearly【C7】______, and usually very frightened, they are【C8】______to show that they have a good attitude and the【C9】______to succeed. When the new students are finally【C10】______, there may be one more step they have to【C11】______before registering for classes and【C12】______to work. Many colleges and universities【C13】______an orientation(情况介绍)program for new students.【C14】______these programs, the young people get to know the【C15】______for registration and student advising, university rules, the【C16】______of the library all the other【C17】______services of the college or university. Beginning a new life in a new place can be very【C18】______. The more knowledge students have【C19】______the school, the easier it will be for them to【C20】______to the new environment. However, it takes time to get used to college life.【C1】A．asB．afterC．sinceD．before