绞窄性腹股沟疝在行肠切除、吻合术后应作()A．高位结扎疝囊，并作疝修补术 B．Fer

Mary had to wok at evenings and weekends. Only in this way _____ able to complete the report

by the deadline.[ ]

A. was she

B. she was

C. had she been

D. she had been

零件或部件在径向位置上有偏差时叫做（）。

A、静不平衡

B、动不平衡

C、动平衡

D、静平衡

患者男性，59岁，心前区不适2年。近日感到心悸，心电图检查：QBS>0．12秒，节律整齐，连续出现。

该心律失常伴严重血流动力学障碍时治疗应首选（）

A.利多卡因

B.电复律

C.慢心律

D.普鲁卡因酰胺

E.心得安

痫病为发作性疾病，可有家族史。

蜂群对捕食者的反应。