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.