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【单选题】
某些不合格的建筑装饰材料，会缓慢释放出浓度过高、影响健康的气体，这些气体最常见的是 [ ]A.
二氧化氮
B.
二氧化硫
C.
一氧化碳
D.
甲苯等有机物蒸气和甲醛
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反馈参考答案：
举一反三
【单选题】The girl felt ill ____ ease ____ the presence of a lot of people.
A.
with / at
B.
with / in
C.
at / at
D.
at / in
【单选题】The girl felt ill at ease _____ the presence of a lot of famous people.
A.
on
B.
upon
C.
in
D.
at
【简答题】The girl felt ill at ease ____ the presence of a lot of famous people.
【单选题】The girl felt ill at ease in the____ of a lot of famous people.
A.
absent
B.
absence
C.
present
D.
presence
【简答题】根据识记时有无明确目的,把识记分为 。
【简答题】Situation 1 In a Chinese classroom a girl was asked to answer a question. She stood up and smiled, without any sound. Situation 2 When an American was parking his bike and the bike accidentally...
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