慢性充血性心衰心功能分级中,"轻度活动无不适,中度活动时出现心悸、疲劳和呼吸困难"属于心功能分级()
A.Ⅰ级
B.Ⅱ级
C.Ⅲ级
D.Ⅳ级
E.Ⅴ级
参考答案:B
New ways have to be found to ______ wildlife being endangered. Which of the following is not OK? [ ]
A. keep
B. protect
C. prevent
D. stop
人体内25-(OH)D3的生成部位是()。
A.小肠
B.结肠
C.肝脏
D.肾脏
E.血液