钢筋冷拉时效的最终目的是( )。
A.提高弹性模量
B.钢筋内部晶格完全变化
C.消除残余应力
D.提高屈服强度
参考答案:D
.—I’ll return the book to Mary,but I can’t find her anywhere.
—She ________ the teacher’s office.You can find her there.
A.has left
B.was away from
C.has gone to
D.has been to
腹部肿块,痛无定处,而按之无形者,为()
A.聚
B.癥
C.积
D.虫积
E.臌胀