对病人自主与医生做主之间关系的正确理解是（） A.病人自主与医生做主是对立的 B

按要求完成下列句子。

1. The students should wear their uniforms at school. (改为同义句)

    The students are _____ _____ wear their uniforms at school.

2. His father went out and didn't say a word. (改为同义句)

    His father went out _____ _____ a word.

3. Wei Hua has learned two kinds of foreign languages by herself. (改为同义句)

    Wei Hua has _____ _____ two kinds of foreign languages.

4. Yesterday he received Tom's e-mail. (就划线部分提问)

    _____ did he _____ e-mail?

5. You are supposed to bow in Korea. (改为否定句)

    You _____ _____ to bow in Korea.

停止胃肠减压的指征是（）

A.肛门排气

B.引流液减少

C.腹胀减轻

D.腹痛减轻

E.肠蠕动恢复

关于热原性质的叙述错误的是( )

A．具有耐热性

B．具有挥发性

C．具有水溶性

D．可被强酸、强碱破坏

E．易被吸附

原型化方法不过分强调系统开发的阶段划分，也不刻意追求事先完全认清信息需求，而是在逐步实现的过程中完成系统的定义。显然它使用了 【11】 技术克服了传统生命周期方法事先严格定义需求、缺乏弹性、开发周期过长的缺陷，同时也减小了系统开发的风险。

简述差热分析的原理。