引起风湿性心瓣膜病的病原菌是
A. 腺病毒
B. 厌氧菌
C. 溶血性链球菌
D. 冠状病毒
E. 金黄色葡萄球菌
Maximum and minimum working temperatures must be considered when choosing the joint, which
A. maximum working temperature
B. minimum working temperature
C. the joint
D. the insulating material
促使乳汁从乳房内排出的内分泌激素是
A. 催乳激素
B. 催乳素
C. 哺乳方法不当
D. 让新生儿早吸吮多吸吮母乳
E. 喂乳前消毒乳头
发生乳头皲裂的常见原因是
A. 催乳激素
B. 催乳素
C. 哺乳方法不当
D. 让新生儿早吸吮多吸吮母乳
E. 喂乳前消毒乳头