靠压力使金属产生塑形变形的加工方法为（）。
（A）拉拔
（B）剪切
（C）轧制
（D）爆炸成型
参考答案：C
大陆漂移是由_________引起的。板块学说认为，全球大致划分为_____大板块，各大板块处于不断运动之中。
He was thought to have been killed in action because his unit was lost and ________ had been destroyed. [ ]
A. each of his records
B. all records of his
C. every record of his
D. all records of him
