A．一次
B.B．两次
C.C．三次
D.D．四次
在H2+CO2=CO+H2O的反应中，反应物和生成物之间的摩尔比为1∶1。
| Demands for stronger protection for
wildlife in Britain sometimes hide the fact that similar needs are felt in the
rest of Europe. Studies by the Council of Europe, of which 21 countries are members, have shown that 45 per cent of reptile (爬行动物) species and 24 percent of butterflies are in danger of dying out. European concern for wildlife was outlined by Dr. Peter Baum. an expert m the Environment and Nature Resources Division of the Council. when he spoke at a conference arranged by the administrators (管理人员) of a British national park. The park is one of the few areas in Europe to hold the Council’s diploma for nature reserves of the highest quality, and Dr. Baum had come to present it to the park once again. He was afraid the public opinion was turning against national parks, and that those set up in the 1960s and 1970s could not be A. he was to present the park with a diploma for its achievements B. he was concerned about how the park was being run C. it was the only national park of its kind in Europe D. it was the only park which had ever received a diploma from the Council [多选题]每日要检查的服务内容包括:( )
A.客户接待 B.服务用语 C.仪容仪表 D.行为举止 [单选题]高速铁路进行拨道作业，在无供电部门配合时，线路中心位移一次不得超过（ ）mm。
A.10mm B.20mm C.30mm D.40mm [多项选择]要回答自己适合从事哪些职业/工作这一问题，需要考虑（）因素。
A. 自己的职业兴趣 B. 自己的职业性向 C. 自己的技能 D. 自己的职业动机 [单选题]下列可用于水痘的实验室检查是
A. 血清特异性抗体 IgA 检测 B. 血清特异性抗体 IgM 检测 C. 血清特异性抗体 IgG 检测 D. 血清特异性抗体 IgE 检测 E. 脑脊液特异性抗体 IgM 检测 [单选题]原则上一条发车进路由两条进路组成时，正确的办理方法是（ ）。
A.A.先办理远端进路，再办理近端进路 B.B.先办理近端进路，再办理远端进路 C.C.同时办理两条进路 D.D.以上均不正确 [判断题]《铁路旅客运输服务质量规范》中规定，车站开门铃声结束、旅客乘降完毕后上车放下脚踏板，在车门口值守做好关门准备（塞拉门应关闭车门），车动关闭车门。
A.正确 B.错误 [判断题]进站信号机外制动距离内进站方向的下坡道，是指平均坡度加上曲线阻力当量坡度的换算坡度。（ ）
A.正确 B.错误 [判断题]桥长超过3 km时，应每隔约3 km（单侧约6 km）在线路两侧交错设置1处可上下桥的救援疏散通道，并设置防护门。
A.正确 B.错误 [简答题]材料：花语是各国、各民族根据各种植物，尤其是花卉的特点、习性和传说典故，赋予的各种不同的人性化象征意义。人们用花来表达人的语言，表达人的某种感情与愿望.在一些城市，节日里亲朋好友互送鲜花成为时尚，但鲜花销售市场却是冰火两重天。在同一鲜花店，哪些成色好、与节日主题关联度高、包扎漂亮的鲜花非常畅销，而且价格高。反之，哪些不够新鲜、与节日主题不甚相关的花则鲜有人问津。结合材料分析鲜花销售市场冰火两重天的原因。
[单项选择]有氧舞蹈成套中，难度动作分值高于0.6分的减分为（）
A. 每次减1分 B. 不减分 C. 每次减0.5分 我来回答: 提交
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