脾大的常见原因有（）①传染性疾病②门静脉高压③血液病④某些代谢性疾病
A.①②③
B.①②③④
C.②
D.①②
参考答案：B
I didn't know the girl you the sheep. [ ]
A. had fed
B. had her fed
C. had feed
D. had to feed
下列结构静力试验的观测项目中，哪一个反映结构的局部变形？（）
A.挠度
B.位移
C.裂缝
D.转角
