与癫证发生密切相关的病因是（）
A.情志抑郁
B.惊恐
C.悲伤
D.大喜
E.思虑过度
参考答案：A
-It's difficult for the village children to cross the river for school.
- I think a bridge _________ over the river. [ ]
A. was built
B. is being built
C. should be built
D. has been built
卷材在铺贴时，不要拉得过紧，使其平服地紧贴在基层上即可。( )
