住宅外的其他建筑，建筑高度大于（）的非单层建筑属于高层建筑。
A.27m
B.24m
C.32m
D.50m
参考答案：B
一朵完整的花最重要的结构是
A．花萼
B．花冠
C．花蕊
D．花托
—When were you born?
—I was born ______a cold winter night.
A．at
B．in
C．on
D．from
