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问题 单项选择题 A1/A2型题

有关胃肠道手术病人术前准备，正确的是（）。

A.术前3天开始进流食

B.术前12小时禁食

C.术前6小时禁水

D.幽门梗阻病人术前应用蒸馏水洗胃

E.直肠手术患者术前1天口服抗生素

答案

参考答案：B

解析：术前1～2天开始进流食，术前4小时禁水，幽门梗阻病人术前应用温生理盐水洗胃，直肠手术患者术前1天口服抗生素。

单项选择题

In low - speed network ,it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high - speed networks, this approach often works poorly, because in the (71) between sending the notification and notification arriving at the source, thousands of additional (72) may arrive. In ATM network , a major tool for preventing (73) is (74) control. When a host wants a new virtual (75) ,it must describe the traffic to be offered and the service expected.

A．packets

B．cells

C．message

D．files
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多项选择题

企业网银角色共分为（）部分。

A、企业管理员

B、企业操作员

C、企业复核员

D、企业经办员
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