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问题 问答题 简答题

本装置的低压饱和蒸汽（PS）的用途及来源是什么？

答案

参考答案：

低压饱和蒸汽主要用作低位能再沸器、蒸发器的热源。

低压饱和蒸汽主要是由低压蒸汽经减温减压器BH－703产生，还有少部分是直接由LS

加入锅炉给水所得。

单项选择题

男性1岁，先天性双侧完全性唇裂，双侧完全性腭裂，现拟行唇裂修复术，目前常采用的方法是

A．前唇加长法修复术

B．前唇原长法修复术

C．下唇阿贝瓣修复术

D．双侧鼻唇沟瓣修复术

E．双侧均同时采用旋转推动瓣法
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填空题

Beijing: The United States and North Korea had their first ______ in four months here this afternoon as part of the ______ negotiations on how to end North Korea’s nuclear program, but diplomats played down prospects for______. James A. Kelly, assistant ______, and Kim Yong Ⅱ, North Korea’s deputy foreign minister, met ______ of formal discussions, ______ on direct dialogue that began after a stormy meeting ______ in which North Korea warned that it was moving quickly to ______ nuclear arms. The Bush administration had insisted ______ that it would only hold talks with North Korea ______ because, it argued, only ______ pressure would persuade North Korea to______. It got its way when North Korea dropped its insistence on ______ and agreed, after extensive efforts by China, to hold unusual simultaneous negotiations with ______,______,______ and ______ as well as the United States. Though Bush administration officials had not ______ talking privately with the North Koreans during______, the fact that Mr. Kelly and Mr. Kim met on the first day was seen as a sign of ______ by the American side.
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