构件受拉力时，拉力是通过补板接缝一边的铆钉传给补板的。铆钉在传力中要承受（）作用。
参考答案：剪切
My father didn't go to bed _____ I got back home.[ ]
A. where
B. until
C. as soon as
D. while
简述板块构造的基本观点。
