神经紧张的
A. newspaper
B. neighbourhood
C. nephew
D. nervous
E. negative
F. network
G. neither
H. necessary
网络
A. newspaper
B. neighbourhood
C. nephew
D. nervous
E. negative
F. network
G. neither
H. necessary
报纸
A. newspaper
B. neighbourhood
C. nephew
D. nervous
E. negative
F. network
G. neither
H. necessary
1、杨德方程采用的反应截面模型为( )
A、平板
B、球体
C、球壳
D、圆柱