一个直角三角形,它的一个锐角是45。,另一个锐角是( ),按边分类,它是( )三角形。
45。;等腰
关于动脉导管未闭的描述,错误的是()
A.由左侧第一对主动脉弓演变而来
B.出生1年后动脉导管仍然开放
C.分圆柱形、漏斗形和缺损形3型
D.胸骨左缘第2肋间可闻及机器样杂音,伴震颤
E.有周围血管搏动征
根据上下文的意思和首字母填出所缺单词。
1. Let's go to the c_____ Spiderman Ⅳis on.
2. I would like to i_____ my friends to my birthday party.
3. Yao Ming is my favourite sports p_____ .
4. Many students like playing basketball on the p_____ after class.
5. There are a lot of p_____ in the park on Sunday.