铸铁管道接口形式分为（）
A.水泥接口
B.青铅接口
C.焊接接口
D.橡胶圈接口
E.螺纹接口
参考答案：A, B, D
—What is your English teacher like?
—________. [ ]
A. She likes fruit and vegetables.
B. She is fine
C. She is very kind
北回归线在我国大陆穿过( )个省。
A．1
B．2
C．3
D．4
