题目

What a pity! Her husband was killed in an accident, which ____________ (destroy) her hope of happiness. 答案：destroyed 裸子植物和被子植物的共同特征是…………………………………(??? )A．能开花和结果????????????????????? B．能用种子繁殖后代C．受精过程均为双受精???????????????? D.能用孢子繁殖后代