用短语的适当形式填空（共5小题；每小题1分，满分5分）

小题1:The country has __________ __________ (经历) too many wars, making her people suffer a lot.

小题2:They are trying to __________ __________ __________ (利用) energy from the sun and wind to save resources.

小题3:Wang Wei is a careless person, for she doesn’t __________ __________ (关心) details.

小题4:I tried to get Jane to join us tonight, but she wouldn’t __________ __________ __________ (改变主意). She prefers to stay at home in the evening.

小题5:There have been __________ __________ _________ (一系列) car accidents at the crossing.

对低频信号而言，同轴电缆可视为分布参数电路。（）