颅脑损伤病人的卧位取抬高床头15°~30°的目的是
A.预防呕吐性窒息
B.有利于呼吸
C.有利于血液循环
D.减轻脑水肿
E.使腹肌松弛,使病人舒适
参考答案:D
I like flowers. I hope to study at a school ____many flowers and trees in it.
A.in
B.with
C.on
D.by
伤残证件有效期满或者损毁、遗失如何换发或补发证件?