D
网络解释
1. 打死：怎么改一般疑问句:一找be动和情态,二找主语你、我、他,找到了,恭喜你,把他们句首安个家,be动、情态要在前,紧跟主语你、我、他,注意要把some换any. 找不到be动和情态,do会在句首笑你傻,主语三单就打死(does)它,别忘了还有过去式是did.
2. 可以保存吗：Do?you?accept?plastic???收不收行用卡????????????????????? | Does?it?keep?long????可以保存吗?? | Dont?lose?your?head!??别乐昏了头!???????????????????????????
3.
3. does：disorders of excessive somnolence; 过度睡眠障碍