雷达系统对空中飞行物体进行监测识别的原理类似于以下哪种动物的捕食活动（）
A.鲣鸟
B.青蛙
C.眼镜蛇
D.蝙蝠
参考答案：D
用括号内所给词的适当形式填空。
1. She was _____ (embarrass) when they asked her age.
2. My mother cried because of the sad _____ (end) of the movie.
3. We feel _____ (exhaust) after an hour's walk.
4. My cousin will get _____ (marry) next moth.
5. His arguments sound _____ (convince). Everyone believes him.
子宫内膜腺癌患者（）
A.月经前或月经来潮12小时内进行诊断性刮宫
B.月经干净后3天进行诊断性刮宫
C.在月经第3天进行诊断性刮宫
D.在月经第5天进行诊断性刮宫
E.月经周期任何日期内均可进行诊断性刮宫
