高压氨水和低压氨水使用()来切换。
A.开闭器
B.逆止阀
C.四通阀
D.三通阀
参考答案:D
My child didn't feel quite himself these days. The doctor said it was just a flu. What __________!
A.a surprise
B.a pity
C.a shame
D.a relief
男性,45岁,经胃镜和病理活检确诊为胃癌。术中探查发现胃窦部直径4cm的肿块,肿物已经侵出浆膜层,并与肝左外叶及横结肠形成局部浸润,胃大弯和胃小弯侧淋巴结肿大,此时最适合的手术方式是以下哪一种
A.立即关腹,术后应用联合化疗
B.行联合脏器切除术
C.行单纯胃大部切除术
D.行全胃切除术
E.行横结肠切除术