He had a burning ______ to win back the teacher' s confidence in him.[ ]

A. desire

B. feeling

C. emotion

D. impression

在目前，机载气象雷达还不能有效地探测下述何种天气现象（）

A.小雨、冰雹

B.不带雨滴的湍；

C.湿雪、湿冰雹