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问题 多项选择题

胃食管反流病的手术适应证包括（）

A.不能耐受长期服药者

B.扩张治疗后食管狭窄仍反复

C.反流引起严重呼吸道疾病

D.并发Barrett食管

E.内科治疗无效

答案

参考答案：A, B, C, E

选择题

下列关于溶液中所含离子的检验结论正确的是  （　　）。

A．加入氨水时生成白色沉淀，当氨水过量时白色沉淀消失，则原溶液中一定有Al3＋存在

B．欲鉴别FeCl2溶液、AlCl3溶液和AgNO3溶液，向3种待测液中分别滴加足量氨水

C．加入盐酸，有能使澄清石灰水变浑浊的气体生成，则原溶液中一定有大量的CO32-存在

D．加入BaCl2溶液生成白色沉淀，再加足量盐酸沉淀不溶解，则原溶液中一定有SO42-存在
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单项选择题

One of the main responsibilities of ICMP is to report （1）. Although technology has produced increasingly reliable transmission media, errors still exist and must be handled. IP is an （2）protocol. This means that error checking and error control are not a concem ofIP JCMP wasdesigned, in part, to compensate for this shortcoming. Howerver, ICMP does not （3）errors, itsimply reports them. Error correction is left to the higher-level protocols. Error messages arealways sent to the original（4） because the only information available in the datagram aboutthe route is the source and destination 1P addresses. ICMP uses the source IP address to send theerror massage to the source of the （5）

（3）是（）

A.correct

B.conduct

C.produce

D.Connect
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