What is the relationship between the space charge width and doping concentration.()
A. No relationship
B. Proportional
C. Inverse proportion
D. Exponential
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The build-in electric field is from p region to n region. ( )
共聚物的组成F1随着转化率增大而变化的体系有( )
A. r1 < 1,r2 <1
B. r1=r2=1
C. r1>1,r2<1
D. r1=r2=0
两单体M1,M2共聚,r1 =1.0, r2=1.0,若要得到组成均匀聚合物,采用的手段是( )。
A. 恒比点一次投料
B. 控制转化率的一次加料
C. 补加单体M1
D. 补加单体M2