【简答题】在一个长方形中有______组对边是平行的.
【简答题】在左边的长方形中.有两组平行线______.
【单选题】A balance-of-payments statement includes three accounts. Two of those accounts are the current account and the capital account. What is the third account found on the balance-of-payments statement?
【简答题】选择图中的两个图形拼出长方形、平行四边形和梯形.(各写3组) (1)可拼出长方形的有:______ (2)可拼出平行四边形的有:______ (3)可拼出梯形的有:______.
【单选题】Simulation results also __________ the reasonableness and effectiveness of the proposed method.