胸骨左缘第2~4肋间闻及Ⅲ~Ⅳ级全收缩期杂音,肺动脉瓣第二心音亢进()
A.动脉导管未闭
B.室间隔缺损
C.房间隔缺损
D.主动脉瓣狭窄
E.二尖瓣狭窄
参考答案:B
Teachers have to constantly update their knowledge in order to maintain their professional _____. [ ]
A. consequence
B. independence
C. competence
D. intelligence
重组家庭中存在的教育困境有哪些?()
A.没有感情基础,又没有血缘关系,继父继母难当
B.受传统观念的压力,继父继母不敢教育
C.寄人篱下,谨小慎微
D.人际关系复杂,矛盾多,增加了家庭教育的难度