FTTH的入户纤的尾纤连接的常见施工方式包括（）
A.冷接
B.热熔
C.分光
D.焊接
参考答案：A, B
—Why are you crying? Today is your birthday!
—____________. I am so excited with so many friends surrounding me.
A．None of your business
B．Don’t mention it
C．Just can’t help it
D．That’s all right
实体联系模型（E-R模型）中，联系可以同（）实体有关。
A.0个
B.1个或多个
C.只能1个
D.只能多个
