当来流速度为超音速时,喷管或扩压管的断面形状为()。
A.收缩形扩压管
B.收缩形喷管
C.扩张形扩压管
D.缩放形喷管
参考答案:A
根据句意及首字母提示完成句子。
1. Sandy wants to be a policewoman when she g up.
2. Yao Ming is a p basketball player. He plays basketball very well.
3. Peter is going to be an e . He studies math really hard.
4. We m to Shanghai two years ago because my father found work there.
5. I like studying computer science, because I want to be a p
6. I want to be an actor, so I'm going to take a lessons.
7. Stella likes playing computer games, but she doesn't like c science.
下列各项中,属于会计规范性文件的有()
A.《企业会计准则——基本准则》
B.《企业财务会计报告条例》
C.《会计档案管理办法》
D.《会计从业资格管理办法》