蛋黄中含有丰富的各种维生素,除了()
A.维生素A
B.维生素B1
C.维生素B2
D.维生素C
E.维生素D
参考答案:D
It is not easy for today's only child to accustom themselves _________ in a new place without their parents' company. [ ]
A. living
B. to live
C. to living
D. live
常用的人工辅助通气的方法有()
A.口对口人工呼吸
B.气囊面罩通气
C.头罩给氧
D.气管内插管人工呼吸
E.挤压腹部