It is said that the old coins ______ under the earth for about 100years by the time they were discovered.

A．had buried

B．had been buried

C．buried

D．were buried

患者男性，6小时前负重物时，右侧斜疝嵌顿，提示疝内容物已发生缺血性坏死，应做好急诊术前准备的临床表现是（）

A.疝块增大，不能还纳

B.局部有剧烈疼痛

C.疝块紧张发硬，有触痛

D.阵发性腹痛伴呕吐

E.全腹有压痛，肌紧张