As a physician who travels quite a lot, I spend a lot of time on planes listening for that dreaded "Is there a doctor on board.’ " announcement. I’ve been (1) only once -- for a woman who had merely fainted. But the (2) made me quite curious about how (3) this kind of thing happens. I wondered what I would do if (4) with a re M midair medical emergency -- without access (5) a hospital staff and the usual emergency equipment. So (6) the New England Journal of Medicine last week (7) a study about in-flight medical events, I read it (8) inter eat.
The study estimated that there are a (n) (9) of 30 in-flight medical emergencies on U. S. flights every day. Most of them are not (10) ; fainting and dizziness are the most frequent complaints.(11) 13% of them roughly four a day -- are serious enough to (12) a pilot to change course. The most common of the serious emergencies (13) heart trouble, strokes, and difficulty breathing.
Let’s face it: p
A. enjoyable
B. stimulating
C. tedious
D. stressful
金昌冶炼厂位于铜陵县境内,拟实施技术改造及污染治理工程。铜陵县地形兼有沿江平原与皖南山区之特点,地势南高北低,东部分低山丘陵。技改内容包括:熔炼系统——采用顶吹浸没式喷枪熔炼技术淘汰现有密闭鼓风炉;制酸系统——改造原有单转单吸制酸系统为双转双吸制酸工艺;火法精炼系统——淘汰1台50t固定式阳极反射炉,新建2台200t回转式阳极炉,并以液化气替代重油作还原剂;新增污酸处理站,改造现有污水处理工艺。设计规模为年产电解铜8万t(含铜99.95%),硫酸32.71万t,粗铜8万,阳级铜10万t。技改后冶炼工艺包括备料配料——火法粗炼(顶吹浸没熔炼、沉淀炉分离、转炉吹炼)——火法精炼(回转式阳极炉)——电解精炼——熔炼炉、转炉烟气制酸。 项目排水进入章家洲小汊江,砷、重金属满足Ⅱ类水质标准,酚超Ⅳ类标准;小汊江汇入长江铜陵段,该段水质基本满足Ⅱ类水质标准,但按渔业水质标准要求,铜浓度超过0.01ms/L,超Ⅲ类水质渔业标准。评价区内SO2和城区TSP均有超标,空气中重金属浓度未超标。现有熔炼系统SO2无组织排放较严重。厂界噪声昼间和夜间均有超标现象。评价区土壤中Cu、Zn、Cd含量超过《土壤环境质量标准》二级标准;稻谷样品中,Cu、Pb、As含量超标。 根据以上内容,回答以下问题。 |
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