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【单选题】
Vapor given off by a flammable liquid will burn when ignited provided（）A.
the vapor and air mixture is too rich
B.
it is mixed with certain proportions of air
C.
the vapor is too little compared to the air
D.
it is of heavy toxicity
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举一反三
【简答题】重复性是指传感器在输入量按同一方向作全量程连续多次变化时,所得特性曲线( )。
【单选题】Section A Directions: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoke...
A.
Yes, we'll meet.
B.
Of course, we will.
C.
How about tomorrow?
D.
At the school gate.
【简答题】“江山易改,禀性难移”这句话说明了A. 人格的稳定性 B. 性格的社会性 C. 能力的先天性 D. 意志的薄弱性 E. 人格的独特性
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