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【判断题】
细菌培养基的pH值为中性偏碱性。A.
正确
B.
错误
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【简答题】近来，制备和利用氢气这一清洁能源已有多项成果。 (1)德国克莱斯公司成功研制了车载甲醇(CH 3 OH)制氢燃料电池工艺，其原理如下图所示，请观察此图回答 ①燃料电池的正极反应式为____________________________。 ②甲醇与流程图中任一反应物反应制取氢气的化学方程式________________________。 (2)美国Bay等工厂使用石油热裂解的副产物甲烷来制取氢气...
【简答题】Additional activity well-dresseed broad-minded left -handed tight-lipped tight-fisted fur-lined long-winded well-behaved open-mouthed cold hearted I was not at all cold in the snow becau...
【简答题】Combine the sentences into one, using coordination, subordination or both: Mrs Rymer behaved very properly throughout the day. Her pleasant, refined face wore a grave look. her elegant figure was wrap...
【简答题】以天然气为原料经合成气(CO、H 2 )制化学品是目前天然气转化利用的主导技术路线，以甲烷的部分氧化为基础制备甲醚(CH 3 OCH 3 )和甲醇的工业流程如下 (1)甲烷的部分氧化反应如下：2CH 4 (g) +O 2 (g)=2CO(g) +4H 2 (g) △H=-71.2 kJ/mol 有研究认为甲烷部分氧化的机理为： ①CH 4 (g)+2O 2 (g)=CO 2 (g)+2H 2 O(...
【简答题】Last summer, my mother and I went to her hometown, Guilin. The city is very ___ in the world ____ it has beautiful rivers and hills. Many ____from different countries around the world go to _____ i...
【简答题】Mrs Rymer behaved very properly throughout the day. Her pleasant, refined face wore a grave look. Her elegant figure was wrapped in deep mourning. Meanwhile she occasionally uttered a sigh or a sob.
【简答题】I．甲醇是一种优质燃料，可制作燃料电池。工业上可用下列两种反应制备甲醇： 已知：CO(g) + 2H 2 (g) CH 3 OH(g) ΔH 1 CO 2 (g) ＋ 3H 2 (g) CH 3 OH(g) + H 2 O(g) ΔH 2 2H 2 (g)+ O 2 (g)=2H 2 O(g) ΔH 3 则2CO(g)＋O 2 (g)=2CO 2 (g) 的反应热ΔH=____ __...
【单选题】Why did the speaker feel hungry at the end of a dinner in London?
A.
Because the food was terrible.
B.
Because she did not like the host.
C.
Because she behaved in a very Chinese way.
D.
Because she did not have a good appetite.
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