一般来说,有高阶误码则会有(),反之,有低阶误码不一定有()。
参考答案:低阶误码;高阶误码
(-xy3)2的计算结果是( )
A.xy5
B.x2y6
C.-x2y6
D.x2y5
There is a fire aft aboard your vessel. To help fight the fire,you should().
A.put the wind off either beam
B.head the bow into the wind and decrease speed
C.put the stern into the wind and increase speed
D.put the stern into the wind and decrease speed