在工程实践中采用最多的导流方式是( )。
A．两段两期
B．三段两期
C．三段三期
D．四段三期
参考答案：A
He is and he has an sister. [ ]
A. ten--year--old; eight years old
B. ten years old; eight--year--old
C. ten year old; eight--years--old
D. ten--year--old; eight year old
