飞机滚转通道由()控制。
A.副翼
B.升降舵
C.方向舵
D.前缘缝翼
参考答案:A
患儿男,14岁,因“活动后气促6个月”来诊。查体:胸骨左缘第3~4肋间有收缩期喷射性杂音。超声心动图:室间隔与左室后壁增厚,比值>1.3。最可能的诊断是()
A.冠状动脉性心脏病
B.肥厚型心肌病
C.扩张型心肌病
D.室间隔缺损
E.先天性心脏病,主动脉瓣狭窄
Many students agreed to come, but some students against because they said they don't have time.
A.were against because they said they did not
B.were against because they say they don't
C.were against it because they said they did not
D.were against coming because they said they don't