无排卵型青春期功能失调性子宫出血，大量出血需止血。（）
A.己烯雌酚
B.黄体酮
C.丙酸睾丸酮
D.氯底酚
E.口服避孕药
参考答案：A
Spread spectrum simply means that data is sent in small pieces Over a number of the (46) frequencies available for use at any time in the specified range. Devices using (47) spread spectrum (DSSS) communicate by (48) each byte of data into several parts and sending them concurrently on different (49) . DSSS uses a lot of the available (50) , about 22 megahertz (MHz) .
A．bits
B．frequencies
C．packets
D．messages
下列各项中，属于登记总分类账的记账依据的主要有（ ）。
A．原始凭证汇总表
B．记账凭证
C．汇总记账凭证
D．科目汇总表
