相邻光孤子间的相互作用,限制光纤通信系统的()。
A.传输速率
B.色散
C.信噪比
D.接收灵敏度
参考答案:A
If X has a normal distribution with μ=100 and σ=5, then there is approximately a 90% probability that:()
A. P(90.2<X<109.8).
B. P(87.1<X<112.9).
C. P(91.8<X<108.3).
与早期妊娠伴随的最常见的盆腔肿块是
A.多囊卵巢
B.畸胎瘤
C.巧克力囊肿
D.黄体囊肿
E.黄素囊肿