环渤海拥有长芦盐区、辽东湾盐区和（）三大盐区。
A、胶州湾盐区
B、莱州湾盐区
C、渤海湾盐区
D、黄海盐区
参考答案：B
汽轮机速关阀分为蒸汽通道和油通道两部分。
Are you going on holiday for a long time?（）
A.It was a long time.
B.Two weeks ago.
C.No. Only a couple of days.
D.Not long time ago.
