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【多选题】
下列关于O 2 - 结构和性质的叙述，错误的是（）A.
O 2 - 中有一个σ键和一个π键
B.
O2 - 中有一个未的电子，具有顺磁性
C.
O 2 - 的键级比O 2 小，稳定性比O 2 强
D.
超氧化物能吸收CO 2 放出O 2
E.
超氧化物都是强氧化剂
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【简答题】Our warehouse is located in London.
【单选题】Dear Sirs, The order mentioned above was delivered to our warehouse 2 days after it arrived in Chicago 8th Jan. and we regret that we have to complain about the conditions in which we received it. In ...
A.
please correct all the mistakes as soon as possible
B.
that we expect you to replace these suits that have been wrongly delivered with those we ordered without delay
C.
we shall certainly not consider further orders with you and shall report your company to the American Trade Promotion Office in New York
D.
and we think the price is a little bit too high
E.
forty have become very sodden in transit and most of these show signs of rotting
F.
we are also surprised that you appear to have sent us three dozen lightweight gentlemen's suits in Case 1
G.
we therefore expect your prompt action to remedy this situation
H.
and there is no sign of the missing dozen in either Case 1 or 2 【B1】______
【单选题】习近平总书记强调:“增加农民收入,要构建长效政策机制,通过发展农村经济、组织农民外出务工经商、增加农民财产性收入等多种途径,不断( ),让广大农民尽快富裕起来。”
A.
增大城市居民收入
B.
拓宽农民增收渠道
C.
缩小城乡居民收入差距
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