垂带踏跺
参考答案：
高等级建筑的台阶做法，其正面轴线上称正阶踏跺，两旁称垂手踏跺，侧面称抄手踏跺。
The time that he ________ in playing computer games each day is about two hours.
A．spends
B．devotes
C．takes
D．costs
随机误差
