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题目：
单选题
A丙硫氧嘧啶
B甲硫氧嘧啶
C甲巯咪唑
D卡比马唑
E碘化钾
答案：
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运行中，现场进行什么工作需将变压器重瓦斯保护由“跳闸”位置改为“信号”位置运行？
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关于五迟证，下述错误的是（）
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正常生产中系统的进水量是由（）控制的。
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McDonald's, Greggs, KFC and Subway are today named as the most littered brands in England as Keep Britain Tidy called on fast-food companies to do more to tackle customers who drop their wrappers and drinkscartons(盒子) in the streets. Phil Barton, chief executive of Keep Britain Tidy,(62)its new Dirty Pig campaign, said it was the first time it had investigated which(63)made up "littered England" and the same names appeared again and again. "We(64)litterers for dropping this fast food litter(65)the first place but also believe the results havepertinent(相关的) messages for the fast food(66). McDonald's, Greggs, KFC and Subway need to do more to(67)littering by their customers." He recognised efforts made by McDonald's,(68)placing litter bins and increasing litter patrols, but its litter remained "all too prevalent". All fast food chains should reduce(69)packaging, he added. Companies could also reduce prices(70)those who stayed to eat food on their premises, offer money-offvouchers(代金券) or other(71)for those who returned packaging and put more bins at(72)points in local streets, not just outside their premises. A(73)for McDonald's said: "We do our best. Obviously we ask all our customers to dispose of litter responsibly." Trials of more extensive, all-day litter patrols were(74)in Manchester and Birmingham. KFC said it took its(75)for litter management "very seriously", and would introduce a programme to reduce packaging(76)many products. Subway said that it worked hard to(77)the impact of litter on communities,(78)it was "still down to the(79)customer to dispose of their litter responsibly". Greggs said it recognised the " continuing challenge for us all ",(80)having already taken measures to help(81)the issue.
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阀控型开式系统根据其特点多应于功率较大的系统中。
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我国开展用二巯丁二钠治疗锑、铅、汞、砷等中毒()二巯丙醇治疗砷中毒开展于()从哪一年开始使用鳌合剂治疗金属中毒()应用碘解磷定治疗有机磷中毒从()
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软骨基质中含胶原纤维束的是（），基质中含胶原原纤维的是（）。
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明桥面小桥的全桥范围内可以有钢轨接头。
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《MARPOL73/78》中，油类是什么？