皮皮学,免费搜题
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【单选题】
下列叙述中,不正确的是(  )
A.
使用乙醇汽油可以有效减少汽车尾气的污染
B.
制糖工业中利用活性炭来脱色以制白糖
C.
造成酸雨的主要物质是二氧化硫和二氧化碳
D.
喝了汽水以后,常常会打嗝,说明气体的溶解度随温度的升高而减小
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举一反三
【判断题】全身反应法通过身体动作和其他直观手段创设语言情境。
A.
正确
B.
错误
【单选题】犬瘟热感染的动物从鼻液、唾液、眼分泌物和尿中排毒,从而污染饲料、水和器具,通过()传染。
A.
消化道
B.
皮肤
C.
呼吸道
D.
产道
【单选题】维生素D在体内的最高活性形式是( )
A.
维生素D2
B.
维生素D
C.
25-羟维生素D3
D.
1-羟维生素D3
E.
1,25-羟维生素D
【单选题】You ____ twelve then, were you?
A.
are not
B.
were hardly
C.
were nearly
D.
were only
【简答题】维生素A在视色素中的活性形式是(),维生素D3在体内的最高活性形式是()
【单选题】一般情况下,粗纱机主牵伸区承担较大的牵伸倍数,而后区牵伸配置在( )。
A.
1.12-1.48
B.
2.5-3.5
C.
2.5-2.0
D.
1.85-2.0
【单选题】The twelve tables were laws written by ______.
A.
the Romans
B.
the Greeks
C.
the Americans
D.
the French
【简答题】图示的曲柄滑块机构,曲柄1为原动件,已知各构件的尺寸、质量和转动惯量以及质心的位置,驱动力矩 和阻抗力 。试以曲柄1为等效构件,建立该系统的等效动力学模型。
【简答题】Twelve puplis were killed and five__injured after gunmen attacked the school during lunchtime. Acritically Benormously Cgreatly Dhard
【简答题】A.Twelve cookies were given to them. B.The baker was not able to make the cookies. C.The cookies taste much better than she had hoped. D.They were given more cookies than they expected.
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