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举一反三
【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?
A.
Credit account
B.
Investment account
C.
Reserves account
D.
Services account
【简答题】要在长方形的木板上截一个平行四边形，使平行四边形的一组对边在长方形木板的边缘上，另一组对边中已截出一边AB（如图），另一边必须经过C点。现只给你一个圆规和一把没有刻度的直尺，你能解决这个问题吗？若能，画出缺的一边，并给出合理解释；若不能，请说明理由。
【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?
A.
investment account
B.
passed due account
C.
services account
D.
credit account
E.
reserves account
【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.
A.
is to validate
B.
has to be validated
C.
have been validated
D.
validate
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