多项选择题

从控制气体来源角度看，降低钢中气体含量的措施包括哪些？（） A. 提高炼钢原材料质量 B. 采用高纯度的氧气 C. 降低出钢温度 D. 采用保护浇注技术

你可能感兴趣的试题

When describing a chart/figure/table, you are advised to follow four stages. Stage 1: Introduce the topic: Describe the general topic the chart/figure/table concerns, and give background information. Stage 2: Explain what the chart/figure/table shows and briefly expand on the title of the chart/figure/table by providing more details, such as what is shown by each axis on a graph, or each column in a table. Stage 3: Highlight the information of particular interest or relevance, focusing on a new aspect of the information. Stage 4: Comment on the information by emphasising the significance of the information to the essay or report more generally, or on the limitations of the information.
The following sentences are taken from a report on Global Greenhouse Gas Emissions Data. The pie chart shows the emissions by countries. Identify the corresponding stages of the sentences describing the chart and re-order them to make the description logical.

Source: Boden, T.A., Marland, G., and Andres, R.J. (2015). National CO2 Emissions from Fossil-Fuel Burning, Cement Manufacture, and Gas Flaring: 1751-2011, Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, doi 10.3334/CDIAC/00001_V2015
❶ These data include CO2 emissions from fossil fuel combustion, as well as cement manufacturing and gas flaring.
❷ Together, these sources represent a large proportion of total global CO2 emissions.
❸ In areas such as the United States and Europe, changes in land use associated with human activities have the net effect of absorbing CO2, partially offsetting the emissions from deforestation in other regions.
❹ In 2011, the top carbon dioxide (CO2) emitters were China, the United States, the European Union, India, the Russian Federation, Japan, and Canada.
❺ However, changes in land use can be important: estimates indicate that net global greenhouse gas emissions from agriculture, forestry, and other land use were over 8 billion metric tons of CO2 equivalent, or about 24% of total global greenhouse gas emissions.
❻ Emissions and sinks related to changes in land use are not included in these estimates.
Order the sentences in the following form: 2-3-1-4...

答案： 4-1-2-6-5-3

单项选择题

从奥斯曼帝国的改革遇到的困难可以看出来，帝国的（）是改革的最大阻力。 A. 军队旧势力 B. 青年党人 C. 改革派 D. 伊斯兰保守势力