调用上一条历史命令的快捷键是（）
A、CTRL-P
B、CTRL-O
C、ALT-P
D、ALT-O
参考答案：A
近代军阀割据的经济基础是
A．官僚资本主义经济
B．民族资本主义经济
C．封建地主经济
D．外国资本主义势力
The term MODERATE SPEED was previously interpreted as meaning a speed which would enable a vessel（）within half the range of visibility.
A.stopping
B.to stop
C.to be stopped
D.to be stopping
