利用黄河水修渠灌溉，使（）成为了塞上江南。
参考答案：宁夏平原
—Congratulations to you on your passing the final examinations last Sunday.
—______.
A. Never mind
B. Good luck
C. Well done
D. Thank you
论述奥氏体不锈钢与铁素钢的焊接工艺？
