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【单选题】
可燃物在没有外部火花、火焰等点火源的作用下,因受热或自身发热并蓄热而发生的自然燃烧现象,叫做()。
A.
点燃
B.
闪燃
C.
自燃
D.
着火
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举一反三
【单选题】刘禹锡的诗句“芳林新叶催陈叶,流水前波让后波”歌颂的是( )
A.
自我革新的担当精神
B.
坚持不懈的拼搏精神
C.
无私奉献的奋斗精神
D.
筚路蓝缕的建设精神
【单选题】According to the passage, where can you see the remains of ancient mountains?
A.
Pacific Northwest.
B.
Wisconsin.
C.
Japan.
D.
Eastern North America.
【简答题】Since the 1940s, southern California has had a reputation for smog. Things are not as bad as they once were but, according to the American Lung Association, Los Angeles is still the worst city in the ...
【简答题】为调高作物品种的产量潜力,育种工作者需要关注那四个方面的问题?
【简答题】Since the 1940s, southern California has had a reputation for smog. Things are not as bad as they once were but, according to the American Lung Association, Los Angeles is still the worst city in the ...
【判断题】二十四节气的“大暑”标志着炎热夏季的正式到来。()
A.
正确
B.
错误
【单选题】刘禹锡的诗句 “芳林新叶催陈叶,流水前波让后波” 歌颂的是 ( )
A.
自我革新的担当精神
B.
坚强不屈的英雄气概
C.
良好的创新创业环境
D.
筚路蓝缕的奋斗精神
【判断题】某电气元件两端交流电压的相位超前于流过它上面的电流,则该元件为容性负载
A.
正确
B.
错误
【简答题】Since the 1940s, southern California has had a reputation for smog. Things are not as bad as they once were but, according to the American Lung Association, Los Angeles is still the worst city in the ...
【简答题】Since the 1940s , southern California has had a reputation for smog 。 Things are not as bad as they once were but , according to the American Lung Association , Los Angeles is still the worst city in ...
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