题目内容

货币供应量层次的划分是________为标准的。

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中央银行的下列操作会减少基础货币供应的有()。

A. 通过公开市场购买国债
B. 增加对商业银行的再贷款
C. 通过公开市场卖出国债
D. 购买外汇
E. 增加财政存款

Directions: Choose no more than three words from the text to complete the following sentences.Over the years of aviation development, pilots have used bonfires, ________________ and radio navaids for air navigation.

VORenables aircraft to determine their____________ and stay ________________by receiving radio signals transmitted from a network of ground radio beacons.

The signals the a VOR station sends out are a ______________ and a highly _______________ secondary signal.

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