利用矿石中各矿物磁性强弱的不同,在外界磁场中进行选别分离选矿方法是()。
A.重选
B.磁选
C.浮选
D.手选
参考答案:B
甲企业某会计期间“固定资产”账户期末借方余额为2000000元,“累计折旧”账户期末贷方余额为800000元,“固定资产减值准备”账户期末贷方余额300000元。资产负债表中“固定资产”项目应填列( )元。
A.1200000
B.2000000
C.1700000
D.900000
In low-speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high-speed networks, this approach often works poorly, because in the (61) between sending the notification and notification arriving at the source, thousands of additional (62) may arrive. In ATM network, a major tool for preventing (63) is (64) control. When a host wants a new virtual (65) , it must describe the traffic to be offered and the service expected.
A.path
B.rout
C.circuit
D.way