下列选项中，（）是指合同当事人在履行合同过程中，由于当事人一方不能履行合同规定的义务

“十二五”规划提出的我国建立生态补偿机制的原则是（）。

A.谁开发谁受益、谁保护谁补偿

B.谁开发谁收益、谁破坏谁补偿

C.谁开发谁保护、谁受益谁补偿

D.谁开发谁保护、谁破坏谁补偿

单词拼写。

1. She was very _______ ( 心烦) to hear that she failed in the exam again.

2. Business has _______ ( 遭受) loss since the economic crisis ( 经济危机) happened.

3.When he was abroad, his parents were  ______( 担心) about his safety.

4.There were several new events _______ ( 增加) to the program for the 2008 Beijing Olympic

Games.

5. He i ______all the "No Smoking" signs and lit up a cigarette.

影响湿热灭菌的因素的叙述正确的是（）

A.灭菌效果与最初菌落数无关

B.蛋白、糖类能增加微生物的抗热性

C.一般微生物在酸性溶液中的耐热性比在碱性溶液中大

D.被灭菌物的体积与灭菌效果无关

E.过热蒸汽穿透力强，灭菌效果好

鼻腔后2／3黏膜为假复层纤毛柱状上皮。

UWB实际上是以占比很低的冲击脉冲做为信息载体的无载波扩谱通信技术，通过对具有很陡上升和下降时间的冲击脉冲进行直接调制是（）