下例哪项非急性胰腺炎的超声征象()
A.弥漫性胰腺增大
B.胰腺周边脂肪增多
C.胰腺回声减弱
D.胰腺周围积液
E.胰腺轮廓模糊
参考答案:B
I prefer ______ at home to ______ outside.
A.staying; playing
B.to stay; play
C.staying; play
D.to stay; playing
凡承受动荷载的结构构件或连接,应进行()。
A、荷载组合
B、冲击力检算
C、疲劳检算
D、离心力检算